Big news for this cool SSMS add-in–RedGate's SQL Source Control is now feature complete. A full list of v1 features is listed at http://www.red-gate.com/MessageBoard/viewtopic.php?t=11129.
The current beta version is 0.4.0.4, and I've been working with it since somewhere in the late 0.1 early 0.2 timeframe. It's been a very stable and well done tool the whole time I've been evaluating it.
Interestingly, each beta version expires two weeks from release, so it looks like RedGate is using Scrum to develop the product. Cool!
Easter egg alert: If you leave the Help >> About screen open for 30 seconds or so, one of my favorite old arcade games opens up.