As a new member of the Forum, I also have SP1 RTM up and apparently running o.k.
Only took 45 minutes to install and all hardware and associated drivers are working. Don't notice much change in my Vista Ultimate experience from what it was like with the last RC Refresh version, apart from it is taking about 20 secs longer to boot.
I suppose I should grateful that everything seems to be running well and no problems have occured so far.
Will keep everyone posted if any bugs appear.

Intel Core 2 Quad Q6600 2.40 Ghz
Abit IP35-Pro (Socket LGA775)
4GB Crucial Ballistic PC2 8500
500GB Western Digital 16MB Cache SATA-2
OCZ 600W P.S.U.
NIVIDIA 8800 GTS 640MB GDD3