A new flash is on the way for the Strobist community, and it is the LumoPro LP120 shoe mount flash by Midwest Photo Exchange. There are stuff that you would need and not need in a off-camera strobist flash, and this one has what you need, e.g. sync terminal and optical slave, and does not have all the other features that you do not need, e.g. TTL.
Here are some links for more info on this flash: