the lack of UMS and the inclusing of a software lock-in is so you only have two "legal" choices to put music on it,
ripped CD´s or the store the device is locked to, which in this case would be itunes or zune marketplace,
loading DRM infected music from other stores would probobly require DMCA violating actions (for those of you living in the US),
im the other way around, why would you not include along side your proprietary connector a basic small USB to ease charging and syncing without the official cable, i understand theres a vast accesory market, but you can get a generic ipod cable for 3 bucks off ebay, theres no reason to force it upon us, and the mini usb is usualy usless for accesories like remotes, docks or speakers, its not going to steal your precios accesory revenue,