There are so many people I could mention on this thread, but to name a few:
Brent Thielke of AE has always been very helpful to me. He is willing to answer any of the 1000 questions I have and is always has great advice. Very approachable at the races and will always take some time to help you out.
Frank Root of Orion/Novak has always given me pointers and such and setup help. He'll even help you out without you even asking
Aaron Waldron ^^^ has the patience of a Zen master. Some of the questions he's willing to answer on his thread here would drive me crazy. Always willing to help out, even if it doesn't relate to anything he's associated with.
Matt Chambers of Losi was very helpful to me at the Shootout. I pitted behind him and he approached me on his own whim to help me out with setup and more. Always could use more racers like him.
The Numedahls were also very helpful at the Shootout. Larry was giving me little pointers here and there all weekend to try to help me out.
I'm sure theres many more, but the list would be too long