ok so for august I am going to throw some suggestions out there.. and choose based on popular vote.
here are your 2 options:
you basically take any song off the portal and remix it - judging is done based on how much BETTER the judges feel you made your version compared to the original. Sweeping is based on elimination of those who did worse remixing than the original.
Fire and Ice Contest
this idea haerkens back to 2006/2007 from the old MACs - it was an idea I had where you make 2 songs.. of completely opposing elements, and then make a song that is the 2 songs combined where both opposing elements perfectly intertwine and harmonize with each other.
So it's like taking a sharf of one song combining it with a different elemental shard of another song and gettign a fusion complete version. So at the end you would have 3 songs. Your first half, your second half, and then the combined final. Filtering can be done on the final but really it has to be like you simply overlay the 2 songs and they work out perfectly.
TOOL did something like this - I can't remember the name of the 2 songs but separate they sound cool but overlapped they sound complete.
also september NAC has already been locked idea wise - an animator wants to be involved in it and have people make songs for his games- more to come on that when the time comes.