They released a demo for the GT Academy.
It includes 2 cars Nissan 370z Tuned & Production.
Also has Indianapolis GP track.
I think it is still available.
GT5 will be awesome by all accounts & rumours suggest it will be out in October but nothing is confirmed.
GT5P is pretty good & hopefully will tide you over until then.
Just checked on the Aussie store & the GT Academy demo is no longer there :frown:.
GT5P doesn't have licences like GT4.
It's more like a series of missions.
As for import to GT5 I haven't heard anything other than PSP - GT5 importing.
Not sure how that will work?