I have spent some hours looking for a Rails3 dojo-toolkit UJS-driver but I had no luck. Google, github, the dojo official site and different blogs didn't help me.
It seems like rails3 has only three drivers actually written. These are the drivers I found:
Two officials:
Two unofficials:
We could complete this list with the existing ujs-drivers.
There's dojox.rails, though I'm only looking at it right now.