As many IT Pros know, with Vista comes new drivers - and for many devices there are no new drivers. Well not yet anyway - updated drivers will come in due course. Well, for the most part - I'm certain some vendors will simply not bother, in effect dropping support for older hardware.
Radarsync has put up a really useful Vista Drivers page, which lists the latest Vista drivers and provides direct links to downloads. They are offering this as a free service to the community.