The Lexar JumpDrive Firefly is the best designed flash drive I've come across yet.
Below is an amazon link, you can click through to see a larger picture of the drive –
So, what makes this guy so great? First, its small and convenient size – about half the length of some flash drives. And second, the location of the key-ring clip makes sense!
More times than I'd like to think about, I've seen an entire set of keys hanging from a computer because someone has their flash drive on their key-chain. Every other flash drive I've seen puts the key-ring hole on the drive itself, even if the drive has a cap. If you look at the picture of the Lexar drive, you'll notice the hole on the left side, in the clear plastic cover. This allows someone to keep their drive on them at all times, and when they want to use it, they just pull it out of the cap and just plug it in. The cap stays attached to the key-chain, rather than the drive!
Why is this brilliance so uncommon? Especially when the alternative just seems so stupid?