When Adobe bought Fireworks from Macromedia they quietly dropped ImageReady, a cousin application of Photoshop which was specially tooled up to help create web graphics.
Among the really great features included in ImageReady was a Rollovers panel, which really speeded up the process of creating rollover buttons for web pages and was quite missed. However you can get quite a long way using Layer Comps and Styles along with the Slice Tool… Check out da Vid!