Just picked up an A920 from my local three store. From what I've read it is currently locked to applications from three so that they can charge for them (hopefully that'll change soon).
So far, pretty impressed with it, but as I'm waiting for those muppets at three to activate my SIM (up to 72 hours!!!) I haven't really done much except play with the calendar and contacts.
I think I may now retire my Palm Vx after so many years of faithful service.