a Firewire shuffle would totally defeat its purpose as a flash drive and most of its market, since most PCs still don't have Firewire ports. but, I know my friend's 4g iPod syncs much faster via USB with my computer than my shuffle does. so I don't need Firewire, but I do want that blazing fast speed.
what would be really badass is if they could get an OLED display that only appears when it's needed, otherwise it totally disappears so you can't even tell it's there. when the song changes or when you push a button, black lettering appears on the white or white on the black. well I guess you'd need to use LCD for the white, to get that black going. it'd also be nice to get a switch that can be operated with gloves on, and earphones with a cord that doesn't freeze in sub-0 temperatures. (yeah, I live in Canada.) please not rubberized though, that would ruin the whole look of the thing.
hey, idea coming here... give the Shuffle infrared and it can double as an Apple Remote.