Actually, I too have had problems with a couple of usb devices since day one
with Vista (I beta tested starting in June of 2005). Folks who have devices
that they used prior to upgrading to Vista often have these problems. I
have seen enough reports to think that there is a grain of truth to what
Quaoar is saying. I don't know about SP1 fixing all of it, though. A lot
of older usb devices just never will work. The folks who fare the best are
those who buy devices either with or following the purchase of a new
computer with Vista preinstalled. Even then, as you can see by the postings
in this ng, all is not roses.
As for Vista SP1, it has to release in late February. That is the date for
the release of Windows Server 2008. W2k8 will release already at Service
Pack Level 1. Since Vista and W2k8 share the same core files (or codebase
if you like) Vista SP1 cannot release more than a couple of weeks after W2k8
goes gold because both must be kept at the same service pack level (for many
reasons).
The late February release for W2k8 (2/27/08 IIRC) is firm. The launch
events are already being set up all over the world with Microsoft personnel,
MVP's, and all kinds of channel experts already committed. That release
date is how you know approximately when Vista SP1 will release.