Just so you all know: http://www.hksusa.com/categories/more.asp?id=1092
GT25 inlet, GT30 outlet (from memory). Adaptors are only cheap, and if you can do it, a very good way to mount the wastegate is to get it attached to the turbine housing directly. Toyota have done this in some of there performance stuff, works well.
Interesting you should ask about the hybrid IC, it actually works very, very well. I went for a 1 1/2 - 2 hour thrash through the hills running 1.7 bar and on boost nearly all the time except for braking for corners - detonation was only 28 peak during that time.
On the dyno, the guys commented how well the cooler worked as the outlet end tank was icy cold - the inlet of course got quite warm - this was during a full tune for around 3 hours.