I just want to get this info out there, with mad props to Ukki, the author of this fine app!

I was just messing about and I tried streaming a 720p MKV onto the N900, and it worked! So I decided to push it, and attempt a 1080p MKV, and it also worked! Yes, the 1080p file was not quite a slideshow %^) but there it was, on my N900... simply amazing!

The 720P file was completely watchable, I should point out, with only an occasional dropout.

I was going to do a nice little video showing this, but my cam skillz are sadly quite poor. I may still put it up, but for now, I recommend you go get Knots2 from the dev repositiry and play around with it for yourself (if you're the type that does that sort of thing).

I guess I should make the mandatory warning that downloading and using any app from the developmental repository is highly risky to the health of your N900, and you should do so at your own risk and be aware of the consequences for needing to reflash your phone, data loss, etc etc.

Ed. Here's a video on Youtube showing it in action
http://www.youtube.com/watch?v=jkGPkXkcFss
You'll just have to take my word for it it's the same file being played on both screens!