DataViewWebPart RunTime documentation
Sorry to be so lax in my postings. I was really busy getting ready for PDC and now Beta1 for Office looms somewhere on the horizon. Please check out Rob Mauceri's blog on our plans moving forward.
Additionally, check out this article on MSDN which documents the DDWRT (data driven web runtime) functions available in the DataViewWebPart. This was done with a lot of work from Serge Van Den Oever as well as our dev team.