Veda - http://www.vestibular.org/

Dizziness and Balance, Tim Hain MD - http://www.dizziness-and-balance.com...ers/index.html

some web-based support groups,
http://www.thedizzylounge.com/
http://www.menieres.org/

You can also find many email groups, yahoo, google, MSN etc, try googling for vestibular or any other specific disease affecting balance.