while i applaud your charity efforts, i want to let all those non-designers understand how design contest driven sites like 99designs hurt the design industry as a whole.
to put it in perspective for programmers, it's like submitting a completed project (or at least a functional beta) with no guarantee of payment. it's up to the client to pick the best "code" and all the others lose their time/money.
for more info on how this is hurting designers: http://www.no-spec.com/