Ravelry http://www.ravelry.com/ is such a fabulous resource. I am so impressed by what they have created. I constantly follow threads that will help me during my transition. I find the forums to be endlessly educational and occasionally I will throw in a question of my own for clarification.
My guild uses a group to communicate with members so I check in regularly with them but my very favourite thing about ravelry is the way it connects the community of Knitters world wide. Every question gets an answer and I just love that everyone is so generous sharing online tutorials and other resources.
Some Knitters describe Ravelry as Facebook for Knitters but I think that description does not even come close. It's WAY better!