I would be very interested in this, a place where anyone can hop in and share what they have. I've was considering hosting something like this but my internet wasnt good enough to host a dedicated server.
Took a crack at the Cylon Basestar from the Battlestar Galatica series. Individually placed blocks with X-mirroring came out to a total of about 25000 for one half Unmerged, which then was copied and inverted to face the rear and merged for a total of around 11000 blocks. Not entirely complicated but a very droll and tedious process.
Absolutely beautiful work, attention to detail, and effort. my jaw dropped when i went to satisfy my curiosity. Keep up the good work and i look forward to seeing what other fantastic art you can come up with.