MP3 minis...

The new apple shuffle... Amazingly small...
But its an apple... And who the hell buys an MP3 player without a screen!

So why not the Iriver S10!

From Cnet:

The good: Brilliant design; D-Click navigation; good transfer speed.
The bad: Poor battery life; lackluster FM auto scan.
The bottom line: The iriver S10 may have its shortfalls, but it's all at the expense of size. At least, from the standpoint of a mini MP3 player, it's probably the best that money can buy.