Since these things are starting to get more frequent and are interesting for this community, I thought that it would be a good idea for a thread where people mentioned remix contests, announced them for their own projects, or showed their entries, etc.
To start with, I thought I'd mention the These New Puritans remix contest for their track 'Hologram' -- http://blog.fairtilizer.com/contest/puritans-2/ (though the deadline is this Saturday, I'm afraid) -- and shamelessly plug my own entry: http://fairtilizer.com/track/123129
Hopefully this thread can catch on... I look forward to hearing about remix contests and exchanging entries and such!