Here is the collection of blogging discussion forum links.
blog4lib: blogging in libraries
A mailing list and web resource for librarians who maintain or wish to maintain weblogs (blogs). Discussion might include software resources, file manipulation, service recommendations, etc.
For discussion of development related to the - Blogger API. And stuff.
An online Blogger forum for bloggers.
This discussion list is for technical discussion of weblog-related software.
A community on Reddit for bloggers. It has over 31,000 subscribers.
A discussion group for those designing their own blog tools.
Weblogger User Group
A user group for and by webloggers.
WebmasterWorld includes lots of forums related to maintaining a website or blog. The forums include one called Blogging SEO Blog Administration.