So I made some changes based on suggestions by some members (ironically ones who probably won't participate) and now we have this design:
People who've remarked interest:
Xccj: Pieces 05, 08, and 09
Chocolate Frogs: 10
Black Six: 01, 02
Letagi: 03, 06
Based Goomy: 12
List of sections with difficulty and color requirements:
Piece 01: (Medium) Black Six Claimed. Requires dark green, lime, black, lgt gray, white
Piece 02: (Easy) Black Six Claimed. Little bit of dark green and green, then black, white, lgt gray.
Piece 03: (Medium) Letagi Claimed. Blue, Dark Blue, dk gray, lgt Gray, Tan, lots of White
Piece 04: (Easy) Dark green, Lime, Green, lots of white and lgt gray, Pending Xccj Claim
Piece 05: (Hard) Xccj Claimed. (Yellow, orange, dk tan, sand blue, dk azure, dk blue)
Piece 06: (Medium) Letagi Claimed. A few medium blue, one purple, some tan, redish-brown, dark blue, blue, black, both grays, white
Piece 07: (Medium) Kayr Claimed. A few dark azure and medium blue, some dark blue, blue, black, dk gray, lots of white and lgt gray
Piece 8: (Hard) Xccj Claimed. (Dk Azure, Dk Blue, Med. Blue, Sand Blue, Purple, Blue, Black)
Piece 9: (Hard) Xccj Claimed. (Dk Azure, Dk Blue, Blue, Med Blue, Yellow)
Piece 10: (Easy) CF Claimed. (Dk Blue, blue, Dk Gray, Lgt Gray, White)
Piece 11: (Hard) Dany316p Claimed. Dk Azure, Medium Blue, Blue, Dark Blue, Tan, Black, Dk Gray, Lgt Gray, White
Piece 12: (Easy) Based Goomy Claimed. Some medium blue, dark blue, tan, dk gray, black, then lgt gray, blue, lots of white.
Claim your piece now and bring it to Bricks Cascade!
(And if we can't make it to twelve baseplates, we might need to tweak this down to a 96x96 stud mosaic. But hopefully we can pull it off!)
We would have some standards. This is going to be a studs up mosaic, with a brick's depth. (This means you can stack three plates and only the top one has to be the right color!) We want solid studs on top, so any regular plate or brick will work, but bricks with hollow studs, like technic bricks, are out. Let me know if you have any questions about colors or whatnot; I'm not against making small tweaks here and there. I also claimed most of the pieces with rare colors, which I'm pretty sure I can cover with my collection. If you feel you can cover one of the pieces I've claimed, I'll be happy to give it up, but I figured most people who'd want to participate might not have been collecting as much dark azure, dark purple, or sand blue as me.
This is meant for Bricks Cascade, but since that convention is on the official BZP MOC Convention Circuit, pieces could theoretically be sent in too.
Thanks again, and claim your piece(s) today!