Keep in mind, even if they had decided to halt it due to a showstopper bug, they've already released it to several thousand owners. Which means they're obligated to provide anyone on .217 with a way to get back onto the upgrade path, if they decide to release a newer update down the road.
All in all - if you're impatient, just install the current .217 files - you'll still be able to upgrade again later if you need to.
Btw: I'm on it now, and I ABSOLUTELY HATE the Dialer and Contacts being split apart into totally separate apps. I always hit the Dialer icon first, and then if I can't remember a person's phone number, I now have to back out of it and look up the contact first. Whereas on GB I just had to select the Contacts tab and go on. So from a human interface perspective, this new design sucks.
T-Mobile G1 / radio 18.104.22.168 / SPL 1.33.0013d / Recovery RA-dream-1.7.0 / FroyoByLazlo-4
T-Mobile TP2 (RHOD210) / radio 22.214.171.124 / WM6.5 / XDAndroid FRX06+Fixes
Verizon Droid4 / 6.16.217.XT894