A mountain board centre in Bideford (was called SWMBC) is now open for bikes and the local bike club TT Freeriders (http://tt-freeride.blogspot.com/)have recently run a locally based fun 4x comp (http://www.huckmonkey.com/2008/07/21/bedrock-invitational-report).
The TTFR will be running  regular small fun comps and organised rides onsite at South West Extreme (new name for SWMBC).
See footage of the track on http://www.youtube.com/watch?v=eXCXxj-NJpc