As far as I can see, the fastforward feature request is older than a yeah! This feature should have been impelented right from the beginning and it's still missing?!?!?
If you do a search on this subject you'll find an interesting post from RokuMike (possible even in this thread) explaining that implementing fast forward and rewind is non-trivial for a streaming
music player. You also need to take into consideration the fact that the Soundbridge must deal with multiple communication protocols.
I agree that its a very desirable feature and even essential for listening to audio books and podcasts. I'm sure Roku realise this too. However, I think we have to appreciate that it may not be that 'basic' a feature to implement.