No help for accelerator but just a comment about Earthlink and Vista.
My new laptop runs Vista Home Premium fine but the Earthlink Toolbar takes 2 to 3 MINUTES to appear on my desktop after connecting via WiFi at the library or dial-up here at home. Earthlink Support acknowledged that they have a Toolbar problem with Vista and are working on a solution.
I gave up on Earthlink Accelerator on my XP desktop because of frequent errors and never considered installing it on my new laptop. It worked with XP but not well. In fact, Total Access has always had occasional errors on my two XP computers. I just send the error report to Microsoft and get the reply that Total Access has known problems.
I still use Earthlink and think it is great for $9.95/mo.
OK, have talked to Earthlink chat lady, installed and reinstalled Total access.
Still cannot get accelerator to do any more then the minimum (read zero) acceleration.
Got very used to this feature with XP, and suspect that something in VISTA disallows this function.
Any ideas?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic