Of course I assumed that we're on LWN, and it's needless to say that I know ca. 95% are using Mac OS or Windows so they can upload music to the phone. I just pointed out it depends on some factors, like whether you're using those OSs or not, or of course if you're willing to install iTunes or not.
Regarding Amarok developers and others, and your iPod Touch, the ability to upload music to the Apple devices depends on whether the lock-down system has been overridden or not, and Apple just closed down ipodhash for trying to make Ipod Touch / iPhone using software 2.0 usable for Linux users. So at least I wouldn't depend on a feature that the vendor actually tries to close down with all the powers they have.
Regarding your listed features, you can actually remote-control your media-center with it (ReMoko for example), and can use the device as a "Bluetooth mouse".
I'm surprised at the amount of people on LWN who concentrate on just the what-the-user-gets-now instead of the benefits of actual freedom of usage instead of vendor lock-in. We're not really talking about what the user gets now even when talking about Linux booting on the iPhone.
I do hope the mentioned "people" actually start demanding on the freedoms, but Openmoko phone products are not even products yet really. However, it will always be the most demanding, most aware people who actually start demanding better, eg. more free, products, and the masses are happy if they just get the cover flow.