You wouldn't have listened (: To be honest, we sent an email to Freenode administration a day before and informed them about the project. We may have acted a bit hastily and we could have waited longer, but still we're happy that our project received much attention after this happening.
2: Why just Freenode?In our point of view Freenode is one of the best sources to collect test data.
Probably GPL.
4: How are you going to handle spammers and fakers etc. who try to ruin the data quality?It's an arms race. We hope that our reliance on large masses of data will help us. Moreover our statistical models are somehow resistant against attacks.