I actually liked Planescape except for one thing - the stupid chimney sweep language that infected it. So I actually bought the Planescape game when it came out. Never finished it though, because I hate real time clicky combat that it and other Infinity games feature (I own all of them yet have not gotten more than an hour or so into them because of that. So why keep buying them? I don't know).
Anyway, enhanced versions of Baldur's Gate 1&2 have been released, now it looks like Planescape is the next one.
Presumably it will continue to use the 2e rules, though maybe with some additions.