MediaWiki 1.10 has been released – yay! From a brief email exchange with Brion, the release manager, the next release is currently planned for the start of July, so as to make up ground for the longer than normal 1.10 release cycle. This means that instead of the usual 3 months between releases, this time you may have around 1 month and 20 days (nearly half the usual time). So, if you wanted to integrate anything largish into the next release (MS SQL support could fall into this category, as could the rev_deleted work), starting sooner rather than later could be a good idea.