The final version of SMF 1.1 is out. That's right, as far as 1.1 goes, no more release candidates for this forum software.
SMF is by far one of the easiest Web applications to install and upgrade that I have come across. In fact I upgraded my WebCMS Forum within 24 hours of the release and haven't looked backed. Though, I'm giving a week or two for some burn in time before I upgrade a client's site.