I'd have hoped they would aswell. From my understanding, the main problem is that the USB connection to the phone from the 2.0 firmware is prohibited by Apple, and as of yet, no one seems to have been able to crack that - at least for unlocking. Apple, in their public SDK platform, and expressly prohibited any app builder from using the USB connection in any application - which is why there aren't any file transfer apps that can utilise the USB dock connector. FileMagnet (GREAT looking app btw, but at the mo only availble for OS X users, no Windows support yet) got round this by using wifi between Mac's and your iPhone to transfer files to and from, but so far no-ones been able to, or allowed to, use the USB within an app protocol.

The firmware revision has proved so far to be pretty tight, and Apple want to keep it that way - which is understandable! Apple lose money if their products can be hacked. Same as if they laxed the bluetooth and allowed bluetooth file push/pull - Apple lose money if you download a song to your iPhone from itunes then send it to everyone you meet using BT. I get that. DRM isn't on it's own strong enough to prevent that kind limitation (ie, limit only the ONE device to play that song/video, as there would be outcry if you couldn't transfer a song bought via your iPhone to your mac/PC)

So I understand entirely why Apple have done it. It's just a shame they decided to follow the direct money route of sell the exclusive contract to the highest bidder, rather than go for the domination market of letting all carriers push their product, and probably recieve a greater profit, albeit not in one fell swoop like they have with exclusive contracts......