> http://code.google.com/p/program-ab/
AFAIK, Program AB is a commandline program. Normally, you would run a commandline program on a LAMP stack, for instance on the desktop, basically a Linux machine. (I haven’t had good luck running Linux commandline programs under Windows, yuck.)
Once you’ve got the thing running on your desktop, you can then push it to the cloud, for instance to Heroku.
I firmly believe the best way to ramp up your AIML learning curve is to first make an AIML bot on Pandorabots, for instance using “open source” AIML intelligence, like the Free A.L.I.C.E. AIML Set. You could then apply that AIML to your Program AB.