Oichi over at VersusCity recently posted that the arcade version of Super Street Fighter 4 will have a location test this weekend in Akihabara. More location tests will be held in Japan over the following weeks, and you can check out the dates and location by clicking here. This was confirmed with screenshots of the arcade version at the official CAPCOM site.
Oichi also mentions there is apparently a new ranking system for the arcade version -- one number for your national rank and another for your local rank. There have been hints of additional features not seen in the console version being added to the arcade version as well, so we'll keep you updated as new info surfaces about this release of the game.