I apologize for the delay in getting a response.
If you are looking for code examples for creating and editing forum, forum groups, threads, and posts programmatically, these are available in the Sitefinity Documentation: http://www.sitefinity.com/documentation/documentationarticles/developers-guide/sitefinity-essentials/modules/forums
However, looking at the API reference (included in the SDK
) I don't believe there is yet any Fluent API for forums.
I hope this is helpful!