There is a vigil being organized by Desis Rising Up and Moving (DRUM) on May 11 in Pennsylvania, the date of T.'s bond hearing. This is the vigil that was postponed from about a month ago. They've collected about 200 letters, which is more than enough, to present to the immigration judge. If you're interested in finding out more about when and where this is and available transportation options from New York, please e-mail kavitha AT drumnation DOT org. You can also find contact information by clicking on the organizational link in the sidebar.
There may work undertaken in other cities as well, and I will keep you posted about that, if PA is out of the question for you :)