The original iPod Nano has a software update available. Mainly for various language support in the Nike gizmo add-on but there are bug fixes.
The big bug for me, which made me go back to v1.1 was when playing Audiobooks the iPod would freeze for ten seconds or so. The audio would play but the menu system was frozen and would except any clicks to pause , stop, volume etc.
I have been told v1.3 fixes this problem.
Now the hassle… I am guessing you can only get via itunes7 – and I am not installing that lump of super buggy software on my PC, I’ll wait until it is sorted out as well.