HHKB Pro2
The HHKB-lite2 has a hub, too -- and dedicated arrow keys. Just no keyswitches (rubber dome, but very nice for it).
built in hubs are an oddity in nice keyboards; you might have to ad-lib in this wise:
- get a 6" USB cord
- get a 4-port hub
- get an extension USB cord of the needful length
Then you'd plug the extension cord into the computer, the hub into that, and set it next to the keyboard because you've got a very short cord going from keyboard to hub.
Of course, that assumes you have something of a desk to set the hub on. Taping the hub to the keyboard would look just a bit tacky but would remove the dangling-weight problem.