I'm running ALS on my ViPEC v88 ECU in Group N mode - aka cracked throttle. It works REALLY well for cable-driven cars. Drive-ability is surprisingly good on transits.
I'm also selling a v44 (a solid system for any EJ205, non-avcs setup) - check the classifieds. That will also do ALS, launch control, and pretty much anything. The ViPEC is a proper motorsports ECU.
My current setup allows for about 12lbs of boost off throttle. Currently running 24psi on throttle.
There's also a decent discussion of ALS methods over on Dirty Impreza: http://www.dirtyimpreza.com/forums/s...ad.php?t=26205