Cognitive Behaviour Therapies, such as Rational Emotive Behaviour Therapy, which I suggested is probably the best option available for social anxiety issues. A book such as "Performance Anxiety" by Robin and Balter may be of benefit. Many people will gain great benefit from reading books on this issue, others may need the assistance of a therapist.
PS When I posted my original reply I hadn't realised that there were 3 pages of this thread, I had only read the first page. I wasn't aware of the more broad social anxiety issue at that time, but in effect my advice is still valid. Shyness and social anxiety are closely related as evidenced here: