hi,I tried the rygel app, and here it worked very well!

I installed rygel, then started it from xterm and noticed that the trackerd was working right after start. I waited till it was finished and then I could access the music, videos etc files of my n900 from my PS3! I could watch the videos/pictures/music right away or copy it to my ps3! Fantastic!

So maybe its your tv which had problems...