I tried both manufacturers web sites and neither have yet developed specific Vista drivers.
Certainly as far as the Thomson Speedtouch 330 modem goes I think that this is the model that most of the BB ISP's issued free a couple of years ago and I can't believe that it won't work on Vista as there must millions out there.
I know with W98 and XP a lot of generic drivers were provided in the program software for various items of hardware and I wondered if any of the new Vista users had come across them yet.
It's early days yet so I'll leave the thread open.
As I suggested earlier, try emailing the manufacturers and asking them. They are far more likely than any of us to know what's happening with drivers than anyone here.
Meantime, have you got those two bits of hardware attached to your current computer? If so, run the Vista upgrade advisor and see if it reports any problems. If it says they're fine, there's a good chance that Vista has drivers for them.
Yes, I've seen a lot of grumbling on various forums about the iffy drivers for the 8800. Mind you, at least you have Vista drivers for it. There are only beta drivers for my Nforce 4 mobo and Raid controller *grump*