Some advice based on experience: hold onto those parts. You may want to sell the pista eventually and it will be a lot easier to sell as a complete bike than as a frame. It may be worth keeping the around just in case. I bought a pista, rode it for a couple months, hated the noisy drivetrain. I contemplated upgrading parts but decided in the end I didn't love the frame either. Sold the pista for exactly what I paid for it to someone who was looking for what I was looking for when I bought it: an inexpensive complete bike. Anyone smart enough to build their own bike probably won't be interested in the pista frame. That's just my sense, others may disagree!
Of course, the fixed gear backlash in NYC seems to have begun in earnest. I have seen a lot more postings on craigslist offering fixies for sale latey. Or maybe they are people who tried it and decided they did not like it. Langsters, Pistas and Fujis seem to be popping up quite a bit.