There's a fairly popular site that's similar to your idea - http://rosettacode.org/wiki/Category:Programming_Tasks http://rosettacode.org/wiki/Category:Programm

There's a fairly popular site that's similar to your idea - http://rosettacode.org/wiki/Category:Programming_Tasks http://rosettacode.org/wiki/Category:Programming_Tasks Your idea is good. You need to figure out how to incentivize users to submit code.