Let the hive mind of Engadget get that for you.
"I just switched to Sprint from Verizon about three months ago for the Pre. Then I went for the Hero about a week ago. Now, I miss my hardware keyboard and am thinking about switching to the Moment. I am still able to switch back to Verizon if I want and get the Droid when it arrives. Should I just trade up to the Moment when it comes out, see if I like it, and if not switch to the Droid? Or something else entirely? Help!"
DoComo is initially bringing in the 8707--unsurprising given that it's the first Blackberry with 3G support--with some interface tweaks to handle Japanese language, though it may not support Japanese input. Some test units have been floating around recently but I haven't been able to get at one directly yet. I don't know if they are putting them on general sale, also; I suspect from reading the press release that it will be strictly bundled with the whole RIM server-side package and for corporate clients only.