Ditto.
You can pick up a generic ATF cooler, which I would strongly recommend for anyone boosting their AT.
Back when I had my boosted Celica, I went with a cooler and higher stall TC from these guys -- excellent product. 12 row cooler with heat dispersant coating! Worked great! The TC spun up significantly faster (shaving over .5 sec off of 0-60!) and the ATF always looked and smelled as new no matter how hard I beat on it.
JMO WORLD SITE
If you want your TC restalled, you send them the core and they send it back to you within a couple of days.
That said, while the higher stall converter isn't necessary, the cooler is a must! This should be the first upgrade for boosted autos.
If you guys are feeling adventurous, a couple of shops to try for custom AT builds are:
Level 10 Performance Transmission Systems Bulletproof Transmissions,Supercharger
or
Import Performance Transmissions: Remanufactured transmissions for Audi, BMW, Toyota, Nissan, Mercedes, Acura, Lexus and more
Both should be able to rework your valve bodies and rebuild trans with extra strong clutch bands -- but again, the 7AT shifts so fast, it probably isn't necessary. Also, you can probably tweak it further with a reflash.
Oh, anyone know the code number for the 7AT?