Got TomTom 6 Mobile but couldn't get it to install on the N95 - didn't have any trouble with the TomTom Mobile 5 I had on the N70 though...
Anyway, as mentioned, TT6M only currently works on the N95 as John said, with external receiver.
As Ellz said, the TT7M release has been on the cards for far too long now and there still seems to be no sign of it.
All the best,
Jamie