Sorry to dredge up an old topic but there now exists a workaround for those of you still looking for FF/Rewind.
See the thread in Roku General about Pandora and the Soundbridge:
http://forums.roku.com/viewtopic.php?t= ... &start=105
Basically, Pandora is a free internet music streaming source that a lot of people like.. Folks were trying to figure out how to play it over a Soundbridge, and discovered, inadvertantly, a way around the FF/Rewind conundrum.
There now exists software for most platforms that will hijack an audio stream from a PC or Mac and broadcast it as a stream over a URL. Icecast/OddCast seem to be the solution of choice on Windows and Linux, and NiceCast (commercially supported, $40 from Roguewave) for the Mac.
So the workaround is to play the podcast on your PC or Mac, stream it as a dumb stream, then play that on the Roku. You can now use whatever PC/Mac controls you have for your music server to skip to wherever you want in your content.
For example, I have a MacPro laptop running iTunes. I start the iTunes server, run Nicecast to hijack the audio stream, then play that on my Soundbridge.
Using the Itunes remote application for my iPhone is gravy that gives me a very functional remote to sit on the couch and skip through / rewind podcasts at my whim.
Yes, I know it's turning the Soundbridge into a "dumb" device that's no longer performing the decoding but relying on the server to do it, but I have to ask - what's dumber, a remote device that simply listens to a stream, or a remote device that has no capability for FF/rewind?
Hope this helps someone one.