Just saw this interesting post at Greater Greater Washington about streetcars -- it looks like DDOT is planning a number of new streetcar lines, two of which will go through Columbia Heights.
One line, part of the second phase, goes from downtown up 7th Street and Georgia Ave all the way to Takoma, while a line in the third phase goes from Brookland to the Washington Hospital Center through Columbia Heights to Adams Morgan and Woodley Park. There's also one from U Street that goes through the H Street NE corridor, which would be nice. These are long-term plans, so there's no timetable so far, but I'll be searching for more on them.
It also looks like these would be actual streetcars, rather than bus rapid transit or some other kind of vehicle. Here's what the DC Streetcar looks like (being tested in the Czech Republic) and here's the full map (pictured on the right as well). That sounds good, but I can imagine traffic tie-ups during construction too.
DDOT is holding open houses around the city, with one today at the Columbia Heights Education Campus from 7 to 8:30 pm. It's not really a meeting per se, so it seems like you can come whenever. I plan on going, looks very interesting.