ORIGINAL: Sal Khan
Another vote for Toyhaus here.
Sean there seems to be not only more knowledgable, but more willing to help as well. It would seem all they do is break, fix, and test CEN cars (I'm sure it's not true) and that's a very good thing.
I would also recommend that if you're looking for parts (and to not take advantage of his/their expertise), Toyhaus is an excellent place to deal with. There is no one local to me (Raleigh, NC) who has a consistant selection of parts for my Fun Factor Rally, but to date (And about $200 later) - Toyhaus has come through with excellent prices, full availability, and the shipping isn't that bad - I just recommend waiting 'til you break a lot of things which is about once a week for me.
Don't tell him I sent you though. He might kick you in the nuts for it.
Yep, I've gotten great/fast service from Toyhaus too. I wish all businesses I deal with were as responsive.