So, I decided to read the SMF Dev blog today, and the latest post says that, as of about a month ago, there were 123 bugs, a few of them showstoppers, that need to be fixed before SMF2 can go live. They were hoping to have that taken care of by the end of summer.
And for what it's worth, when 2.0RC1 was released, I restored a copy of the forum database and tried to make a test site (test.x86labs.org). It failed, and I didn't bothe troubleshooting why (since it was a RC release, I didn't really see the point). I didn't talk about it at the time because I hate failing.
So yeah, I'm still hesitant about the short-term benefits of going to 2.0RC instead of waiting for a proper version to be released.