http://groups.yahoo.com/group/LearnToPaintWithDarrellCrow/
This site is extremly friendly and contains a wealth of information.
If you have a problem you will get an answer here. Based in America.

Click to join LearnToPaintWithDarrellCrow
Sue's site is a UK site with a large following. The forum has the answers to many questions on Wet on Wet painting, if it's not there just ask.
http://uk.groups.yahoo.com/group/thejoyofbobross/
Another friendly group. Based in the UK

Click to join bobrosspaintingclub
American artist who's site is not to be missed.
Great site with very large following.
Darrell is continuing the tradition of proving anyone can paint.
His instructional DVD's are great value for money.
http://alexanderart.com/oil_technique.asp
Mainly of interest to people in America.
Great source for reasonably priced materials.
International H.Q Bob Ross Inc. Based in America
http://www.paulbryantart.co.uk/
Bob Ross certified instructor in Norfolk and Midlands. Based in Norwich.
UK distributer of Bob Ross Products. Run training programmes to become CRI's
Free Art Lessons - The Art Instruction Blog
Free art instruction and other great resources on avariety of different mediums including oil painting, acrylic painting, watercolor, drawing, pastels and more!