Webmaster Community Forums  
Professional webmaster forums heavily focused on marketing and search engine optimization.
Details www.wm-community.com

Webmaster Serve  
Webmaster discussion forums exchange ideas with other webmasters.
Details www.webmasterserve.com

Webmaster Shed  
Provides webmasters in need of help with whatever information and/or tips they need to help them out!
Details www.webmastershed.com

ZarasGuide.com  
An online community for mobile users that like to stay upto date, and speak their mind. Users have access to a forum and wiki and actually generate the content on the site.
Details www.zarasguide.com