There were plenty of notes about the DB2 wiki when it first launched, but have you had a chance to benefit from it yet?
The purpose of this wiki is to provide technical information about using DB2 on Windows/Unix/Linux platforms in a slightly less formal manner than the product documentation. The wiki was started to support DB2 Express C users who have downloaded DB2 for free, but since DB2 Express C is largely the same as other editions of DB2, all can benefit from this information.
If you would like to ask questions about the product, try the Discussion/ Help forums. You'll see a lot of ongoing activity on these forums, so join in if you can.