I love the little "discussions" that become available after you've completed a problem, but I think it would be cool if we could rate up certain solutions and sort by that (Say something like, you could give a solution a "thumbs up" and sort by that). I'm thinking of the 3 digit * 3 digit palindrome problem. There are 18 pages of solutions and most of them are exactly the same algorithm with different syntax. There are a few really interesting ones though: bitRakes's ASM solution, the pen & paper solution, there's a python one liner in there, and some slick Ruby (and who knows what else, I gave up after 5 pages). It would be nice if people could recognize some of these interesting solutions and make it easier to find them via "network effect."
Just an idea; thanks for creating such a fun diversion! My GPA just went in the corner and shot itself.