TDK 800 mb is there.
It's TDK 90 minutes disc.
So what would you say there is a lot of 90 minutes media out there.
Fact is that TDK succeeded in creating there disc in such a way that it's recognized by some drives as 90 minutes/800mb.
So you don't need overburning !
Now for some drives(pioneer A03 I think it was) this means that they can burn 90 minutes with this media while the fail with other 90 minutes media.
If people are interested in the packaging check out www.cdr-info.de
or the feurio webstore.