On my way to pick up some hot'n'sour Vietnamese soup from Huynh, I saw a new restaurant on 15th -- right where I believe there was a "Hawaiian Walk-In". (now that I'm back in the office, I'm pretty sure I did not see the Hawaiian place)
Ichiro seems to serve *only* sushi. But their prices seemed reasonable. It's a tiny place, but the chef's area looked spotless, and they were very polite when I asked for a menu.
412 15th St, 510/452-1994.
Also, as I walked to work I noticed the "remodeling" sign on Vo's is still missing. They took it down about a month ago, and work on the inside seems to have ceased. It's too bad, but it's probably permanently gone now.