Hi Dale,
I'd actually love to do this, but it's remarkably difficult. (Well, not difficult, just a lot of work). There are a few apps out there that let you put widgets on your lock screen (here's one:
http://www.myflyscreen.com/ ). Basically for me to do it, I'd have to re-implement the lock screen, along with media widgets and such. Doable, but with free apps that let any widget on the lock screen I'm not sure it's something I want to undertake.
Not that any of this would do what you want yet, since the current widget doesn't have ff/rewind buttons. But that's coming
![Smile :)](./images/smilies/icon_e_smile.gif)
-Marcus