Admin, you might want to clarify the 25+ posts rule. Any Joe Schmoe can come in here and make 25 posts anywhere about anything and suddenly be eligible. I would recommend changing it to say "25+ contributing posts," meaning that the posts must be on topic and not meant to simply bolster a person's post numbers just so they can get into the contest.
Updated it a bit :)
We know we have many lurkers and we value them for sure. I personally lurk on most forums I am part of. So we don't want to exclude them at all. But I agree, we need to prevent against just "fluff" posts. Only in extreme situations would we deem a post as being such though for these purposes.