Time is running out if you want to provide comments on the SML specification being standardized at W3C. It entered “last call” yesterday. You can read the SML draft and the SML-IF draft.
I unsuccessfully searched for a list of changes made to the submitted version (I was a co-author so I know that one well). Failing that, a very quick scan of the current drafts didn’t reveal any major surprise. If I run into a useful summary of the changes I’ll update this post to link to it.