So I realize I'm late by a week, but I just found this forum/thread by happy accident while searching for something else, and I'd like to offer whatever help I can to this project. In fact, I almost tried to do something similar (except as a movie rather than a playable game patch) about a year ago, but couldn't find sufficient interest when I posed the idea to ACF.
How did the auditions go? Did you find everyone you needed? I see Pixel got here before me and mentioned http://thelifestream.net/ , though I didn't hear anything about this project over there, which makes me sad panda. =( If you need a young-sounding 24 year old female who has a difficult time masking her Boston accent, I do have Ventrilo and a mic. If you need something else, well, maybe I can still drum up some interest on TLS yet. =)