We want you to get answers fast. That takes a lot of people to answer questions but instead of creating yet another forum we recommend these sites:

General Robotics and Electronics:
For all general electronics and robotics help with very fast responses. Another StackOverlow love child, not really a forum but so much better. Thanks due to littlebird for firing this up before being annexed by the Jeff & Joel empirial forces.

Pololu Robotics:
Best for technical questions relating to Pololu products. Very active support by Pololu engineers.

SparkFun Forums:
Best for technical questions on SparkFun products. Huge community.

Robot-Electronics / Devantech:
Manufacturers forum for Devantech products. Great support from Gerry and the team.

Official Arduino Forum - Huge community