Thanks and a couple of recommended links....

I owe a couple of "tips of the hat" to:

IP Convergence TV, edited by Jon Arnold, which includes a Guest Opinion column by yours truly on VoIPo3G

and

My estimations on Mobile Internet/Browser users get a mention on week's Carnival of the Mobilists over at a blog called SkyDeck (which I hadn't previously come across). It's got some other interesting articles too, including this one about multiple phone ownership in the US.

Cheers guys.