If all else fails, post in the general discussion forum closer to the deadline, ask for a little web space from someone - the folks here are usually pretty good about supporting other users projects, even if it is for a competition. I can actually see myself having to do the same thing, my project is gonna be tough to fit into 15mb, and my website is only 10mb, so expect a very anxious Van harassing people for webspace about 30 minutes before the deadline
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Don't leave it to the last minute, make sure you have somewhere to upload it to (or email for uploading) in plenty time - trust me, I tripped up on a compo before because I could'nt get it uploaded in time.
Van-B
I laugh in the face of fate!