I have been part of a KAL. Probably more than one, but I can't really remember. I do remember the most recent KAL was for the Effortless Cardigan. I was really excited, but it took me a few times to cast on and stay with the right stitch count. Then it was plain stockinette, which was boring, and I was super busy with school, so it's in hibernation right now. Hopefully I'll get back to it over the summer.
(Actually, writing this just reminded me about it! Back on the to do list it goes!)