Yes, mine works so far perfectly. I had to use some files from the original bluez-utils, to get CF bluetooth cards running, but so far I think it's stable. I had no problems or such, and if anyone reports something not quite working, then I'll try to fix it and get it as stable as it can be.
I'm using it since 2 days already, intensively, have no problems yet
The only problem that might occur as I see, is with newest DBus package, which some of the older programs, compiled for dbus 0.2x might not work correctly, or at all.
Of course this can be solved by recompiling these programs
My current beta3 setup is so heavily customized that it has almost nothing to do with the default one. I have a shell script which stores exactly what I want in a file, and then have shell script which restores all my settings , reinstalls exactly the packages I want, so I can easily test some packages on plain beta3, and then go back with all my stuff installed in about 20 minutes.