According to Capcom, MadCatz is hard at work producing more Street Fighter IV official arcade sticks which should be ready for release in April.
Unfortunately, they only expect to be able to fill back-orders by the end of April so this story is more of a: "You should have ordered yours already." Not: "Get ready for arcade sticks."
Hopefully, MadCatz will ditch the "Limited Edition" and keep producing them as the demand is off the charts. I currently use a HORI Fighting Stick EX2, but I would like to upgrade to the Tournament Stick now that I know Street Fighter IV's online mulitplayer works.
What's your stick setup?