i think it was a great idea, and a good opportunity to see some interesting integrals. of course it also defeats the purpose if we get stuck on one integral too long. maybe we can modify the rules a bit to keep things moving. like put a time limit on when the integral should be solved--if not solved within that limit, the person who suggested the limit in the first place should give the solution and choose another integral. and of course, there should be some reward for coming up with an integral that no one can solve (within reason)