The current IE7 B2 Preview is stable for website testing
The IE team announced that the IE7 B2 Preview build available online is ready for use in testing site rendering. The feature list frozen, and the rendering engine is solid and won't change between now and release anymore.
That means it's ready to use in testing site compatibilty. Star hack begone!
UPDATE: I tested running it in standalone mode
using the
IE7 Standalone Launch Script. It works, in that it allowed me to browse sites in IE7
without messing up IE6 or my default browser association.
However, I noticed high CPU usage and had to close IE7
using the task manager - it didn't respond to that little
red X thing. I believe these are minor inconveniences
compared to running a separate virtual machine just to
check how a site looks. Obviously, this build of IE7 just
came out yesterday so I haven't put this through rigorous
testing. Unfortunately, it appears that the
standalone browser builds from Skyzyx have been
pulled.