I'm pretty sure I would be willing to use a smart phone if I could use Bluetooth and be assured that the phone functions would not interfere in any way with the use of the handheld. If I'm typing a document and a call comes in, I would want to get a notification of some variety, after which I could press a button on the headset and start a conversation, all the while going back to my document as if the call were not going on.
As for Bluetooth headphones, I agree, I don't know yet why it hasn't come up. I would like to see headphones that double as a a headset and automatically pause the music when a call comes in, and start it back up after the call is over. Now that's integration
I agree, keyboard vs. Graffiti is purely a matter of personal preference. However, the licensees must be driving themselves crazy trying to deal with people who are solidly on either side, much like you and I are

Keyboard users won't buy VG; VG users won't buy keyboard, what's a licensee to do? I would think that two versions of each device wouldn't be plausible.
I'm not sure I would want to go all Sony, but they offer some advantages in their devices. I'm currently using the new CF drivers to run my 1 GB Microdrive, precisely because I'm not interested in the 1 GB MS Pro. I simply refuse to pay $0.64/MB for a 1 GB MS Pro in 2003 after I paid $0.33/MB for a 1 GB Microdrive around Christmas 2001.
Scott