Welcome to Talk3G Graham - nice blog on the Sharp 770. I'm sure that after a while on here you'll be one of the resident experts
There is always bound to be someone who can answer your questions.
The 770 certainly looks the part - how easy is the flat keypad to use? Has it any "feel" compared to a more traditional keypad?
I'd imagine Video Calling to be pretty much the same on any handset given the limitations of the standards and the technology itself. Hopefully someone can bear that out with the 770.