As someone already pointed out Glendix tries to bring binaries over to make Linux feel more Plan9-ish. Unfortunately, I no longer have the luxury of being a grad student and so my time these days is very limited and have had to move on to other things. But if there's someone motivated enough to push Glendix further, I'd be more than happy to help!
As for the question of 'Why Plan 9', to put it simply - reading the source code makes me feel like a hacker again. A long time ago if you didn't understand how something worked, you could just peek at the source and everything would be clear. Plan 9 maintains that, the source code /is/ the documentation. Alas, I wish I could say the same of 'modern' free/open source software (Linux/BSD/GNU/what have you).