How do I know what firmware I have currently?

Just purchased my Sansa Clip 2GB on about 4/14/2008 from Amazon.

Not sure if I need to do an update on firmware or not…

Very frustrated trying to listen to audio books downloaded with Overdrive…From what I’ve read here, the latest firmware isn’t going to help with that, but I’d like to know what firmware I have, and whether or not I need an update.

Thank you!  

When you press the home button, navigate to settings–>system info. You’ll see it there. There’s a new firmware coming out soon, so you might as well wait & upgrade then.