"I feel bad about the atrocities in Burma, but what can the United States, or a single individual do?" you may ask. Just having the question is of great merit to your personal karma.
The United States?
Embargos, boycotts, media focus, denunciations, diplomacy, economic pressure. Military action? Messy and results vary greatly.
Cyberwar is what I mainly recommend. Bring down their cyber-infrastructures, jam their electronic communications, cripple the ability of the Burmese government to communicate with the soldiers.
Condemn China and India for propping up the totalitarian oligarchy.
You as a single individual?
Lone individuals, especially when they band together, without despising small beginnings, can accomplish plenty. Pray for the transformation of Burma military junta into tranquil, compassionate beings. Think positive, blessing thoughts toward Burma.
We can become Buddhistic in our usage of Mind as Weapon, to install deeply in our hearts an overwhelming, negativity-smashing compassion for the oppressed people of Burma.
We can engage in cyberwar, blogocombat, online debate, exposure of atrocities via blogs, Flickr, socnets, Twitter, podcasts.
We can post photos on our blogs of peaceful Buddhist monk protest, and the astonishing rivers of saffron robes that flow toward universal democracy revolution. "Scenes from the Saffron Revolution" is a good example, by Michael J.W. Stickings.
We can denounce our petty, immature "liberal vs. conservative" partisan mentality and stand together, metaphysically declaring total cyber/psycho-warfare on the massive bad karma military junta.
We can imagine and believe for a swift and harsh response from the Universe and God and the Big Bang, against the Burma government.
From my favorite Buddhist text "The Lotus of the True Law":
Thereafter the Lord looked towards the eighty hundred thousand Bodhisattvas who were gifted with magical spells and capable of moving forward the wheel that never rolls back. No sooner were those Bodhisattvas regarded by the Lord than they rose from their seats, raised their joined hands towards the Lord and reflected thus: The Lord invites us to make known the Dharmaparyâya. Agitated by that thought they asked one another: What shall we do, young men of good family, in order that this Dharmaparyâya may in future be made known as the Lord invites us to do? Thereupon those young men of good family, in consequence of their reverence for the Lord and their own pious vow in their previous course, raised a lion's roar before the Lord: We, O Lord, will in future, after the complete extinction of the Lord, go in all directions in order that creatures shall write, keep, meditate, divulge this Dharmaparyâya, by no other's power but the Lord's. And the Lord, staying in another world, shall protect, defend, and guard us.
Then the Bodhisattvas unanimously in a chorus addressed the Lord with the following stanzas:
2. Be at ease, O Lord. After thy complete extinction, in the horrible last period of the world, we will proclaim this sublime Sûtra.
3. We will suffer, patiently endure, O Lord, the injuries, threats, blows and threats with sticks at the hands of foolish men.
4. At that dreadful last epoch men will be malign, crooked, wicked, dull, conceited, fancying to have come to the limit when they have not.
5. 'We do not care but to live in the wilderness and wear a patched cloth; we lead a frugal life;' so will they speak to the ignorant.
6. And persons greedily attached to enjoyments will preach the law to laymen and be honoured as if they possessed the six transcendent qualities.
7. Cruel-minded and wicked men, only occupied with household cares, will enter our retreat in the forest and become our calumniators.
8. The Tîrthikas, themselves bent on profit and honour, will say of us that we are so, and-shame on such monks!-they will preach their own fictions.
9. Prompted by greed of profit and honour they will compose Sûtras of their own invention and then, in the midst of the assembly, accuse us of plagiarism.
10. To kings, princes, king's peers, as well as to Brahmans and commoners, and to monks of other confessions,
11. They will speak evil of us and propagate the Tîrtha-doctrine. We will endure all that out of reverence for the great Seers.
12. And those fools who will not listen to us, shall (sooner or later) become enlightened, and therefore will we forbear to the last.
13. In that dreadful, most terrible period of frightful general revolution will many fiendish monks stand up as our revilers.
14. Out of respect for the Chief of the world we will bear it, however difficult it be; girded with the girdle of forbearance will I proclaim this Sûtra.
15. I do not care for my body or life, O Lord, but as keepers of thine entrusted deposit we care for enlightenment.
16. The Lord himself knows that in the last pericd there are (to be) wicked monks who do not understand mysterious speech.
17. One will have to bear frowning looks, repeated disavowal (or concealment), expulsion from the monasteries, many and manifold abuses.
18. Yet mindful of the command of the Lord of the world we will in the last period undauntedly proclaim this Sûtra in the midst of the congregation.
19. We will visit towns and villages everywhere, and transmit to those who care for it thine entrusted deposit, O Lord.
20. O Chief of the world, we will deliver thy message; be at ease then, tranquil and quiet, great Seer.
21. Light of the world, thou knowest the disposition of all who have flocked hither from every direction, (and thou knowest that) we speak a word of truth.