The Davis Square Community

I commissioned a portrait by a webcomic artist that I really enjoy (there was a fundraiser) and I'd like to get it printed and framed by the end of the month (ideally), when my parents visit. However, I know nothing of printing and framing! Does anyone have recommendations of where I should go for each part? (I'm looking through past "framing" posts on DS LJ, so I guess I'm more interested in printing recommendations, unless there's a new framer since 3 years ago.)

I assume that I'd ask the printer to print it at some standard size, and that the framing shop could then pick an appropriate frame and matting for me. Is that right, or should I already have a frame picked out?

Bonus for T-accessible locations; carrying a framed picture by bike would be annoying.

ETA: I ended up using Big Picture for the framing based on these recommendations, and they in turn recommended Gnomon Copy of all places for printing. So I went with that, even though the latter's pricing structure is exceedingly silly.