Picked up a 512 MB shuffle today at the Somerset Apple Store in Troy, MI. They only had 3 available, and no 1 GB until Sat. 1/22. I haven't used an iPod or iPod mini before, for various reasons.
Hopefully I can help and answer some questions people have, and share some of my initial thoughts.
Deefuzz, they do come with 2 white Apple stickers.
Doctor Q, the lanyard cap and USB cap are quite secure. You wouldn't have to worry about it flying off -- you have to give it a pretty solid pull.
rog, these should work with any USB port on a Mac or PC, according to the article referred to a few posts earlier, they are MS-DOS formatted, so they'll work on both systems, presumably Linux as well. If you wanted to import a new CD on a PC and then transfer it to a Mac, you could make storage space on the shuffle and store the files on there as well as putting the songs on the "iPod partition." Then you could listen to them on the way home and easily transfer them to your Mac without re-importing from CD.
There doesn't appear to be many options for Autofill -- only which playlist/library to fill from, whether to replace all songs, to choose songs randomly (as opposed to in order??), and to choose higher rated songs more often. My idea was to pre-make playlists for filling the shuffle. Say you wanted dance songs for working out, you could make a playlist with songs from that genre and then autofill from that playlist.
I don't have an iPod or iPod mini to compare to, but the sound quality and volume levels are fantastic. And you can certainly fast forward/reverse by holding down the skip buttons.
Maybe someone can answer this for me: since iPod shuffles have a true OFF position, and no internal clock or anything like that, would I be correct in assuming there is no power trickle like iPods and iPod minis?
Hope this helps answer a few questions. Any more, feel free to ask and I'll try my best to answer -- I haven't had too much time to play with it yet.