i like the idea of some sort of cookbook. i also like the idea of trying it out online first. but a couple questions for you before you start doing anything: is this going to be any different from perlmonks organized Q and A section? or some extension of that. is there any reason to go to the online cookbook instead of perlmonks' sections? as for the book, thats a LOT of work. and requires a lot of organization - with publishers, with authors (in other words the whole pm community), etc. i don't know how feasible it would be.
There is a cookbook already. I think it would be better to have a search on this site which will search only good, correct answers and display them. Sort of like a 'perldoc -q' for this site. It may mean going back and deleting wrong answers to questions and only leaving correct ones.