Went to my first one this past May with Numbah. It's now a tradition for us, we are already planning on going this coming year again.
Update: This years Comic Con has come and gone, and wow it was a LOT of fun. As you can see from Numbah's pic we met a few nice Furries. My kids were having so much fun, that they dressed up twice. I have to admit they looked freaking adorable....My only worry is now my oldest is interested in wearing a tail....