[quote name='beguile']Hey make sure you keep your reciept. My coworker's nano crashed yesterday and he only got it for a week. All of a sudden his nano just crashed and you can't do anything to reset it. He didn't drop it or anything. Just froze.[/QUOTE]
Try holding the middle button and menu for 6 secs or so; the iPod's hardware recognizes this as a manual reset.
As for nano accesories, consider alternative firmware (not really an accessory). If you are fairly computer proficient, go to
www.rockbox.org and modify the boot partition. You'll be able to boot Apple's OS, Rockbox, or iPodLinux. iPodLinux is distribution of uClinux modified to work on the iPod (
www.ipodlinux.org). Rockbox is a ground-up firmware that recently started working on various iPods. It supports things such as multiple codecs (MP3, AAC, MPC, OGG/Vorbis, AC3, ALAC, FLAC, WavPack, WAV, AIFF, Shorten), plugins (Games, Applications, etc.), customizable playing screens, and doesn't require iTunes to be installed (you drag-and-drop). If you are interested, PM me.