Here are four forums that may be interest to the Do-It-Yourself types and those who want to learn about and familiarize themselves with their car's quirks and characteristics:
And here are two FaceBook pages that may be of interest:
1 - R56 / MINI Alliance —
2 - N14 Survivor Support Group —
There are no fees or charges for any of these links, although it might take awhile to get signed up. All can be browsed immediately.