Just updated our headsets pretty smoothly. We've had great luck already even before the update, very few problems. Music from our phones (Droid X/Droid Eris) streams perfectly, intercom is pretty quick to cut in. Neither of us use the VOX capabilities, at least not yet. The only issue I've had is pausing music from my iPod/Motorola D650 dongle, but that's most likely an older dongle not playing nice enough. If anyone uses an iPod dongle that works better, let me know. I'm more interested in iPod-specific at this point; really, really, REALLY looking forward to the SR10 hub coming out.
I am curious to see if/when updates will allow group intercom (more than 2 units). There was talk that this update would have it, but the release notes didn't mention that as part of this update. Eventually, we need to pick up a 3rd and/or 4th unit...fairly common for at least one of us to have a young'un riding pillion.