Requirement: You have to see TV signal on your desktop PC
My System, you can use anything that is similar:
Win Vista 32 bit
Digital Tuner (ViXS PureTV Digital TV Receiver, 3 years old!)
N900 3.2010.02-8

Installation:

1) Install orb on desktop PC - Orb20SetupUs.exe (v2.55.0079); I used the international (New!). I recommend unstall previous orb version before installing this one. Follow instructions and set up orb account.

2) On winPC: orb>Control Panel>TV>you should see you TV card listed, if not, Refresh, hilite your TV card>Start Wizard>Auto Scan, takes several minutes; if you have more than one TV card, Auto Scan each one.

3) On N900: web>mycast.orb.com>log in using orb account from step 1)

4) On N900: Setting: DEFAULTS DOES NOT WORK ON N900!
Speed: default 160, change to Use fixed speed 600 KB/s (any thing over 400 will do) >Save
Stream: Winamp Format (.pls) >Save (THIS IS THE KEYSTEP!)
Layout: default
More: default

DONE!

Start your orb server on your win Vista, you should now see a green dot on your Right lower corner of your winPC, now go to mycast.orb.com on your N900, TV>program guide>play channel!

enjoy your TV now

Trouble shooting:
1) 1st you got to see TV on your win desktop
2) Try this out with anoth PC before N900
3) Check firewall setting, they should be on with exception to several Orb programs.
4) Thank bun and post your questions here.

I am trying to see if orb can use HAVA signal; and of course, I will try this on my N8x0 as it has a little bigger screen

PR 1.2? Nay, make do with what you have!

pros: it is free, from your motherboat Nokia (it works on iphone too, but iphone users would have to pay a fee, i wonder why )
cons: to change TV channel is a 10 steps process!!!! but hey, it works

No pics, no story , here are the pics

1) ESPN1
2) ESPN2
3) Orb>TV>program guide (home theatre settings)
4) Orb>TV>program guide (mobile settings)
5) Orb home page

Please ignore the fuzziness, the TV on N900 is crystall clear!

Credit to TMO member ear0wax's suggestions.

Not a card carrying member of N900? Not a problem, step by step instructions for N8x0 is here, http://talk.maemo.org/showthread.php?t=52156

No TV card? No problem, install WorldTV99, news are almost the same but without advertisement, so evening news of 30 min becomes 19 min, you save 11 min per watch of your live! LiveTV with TV card or WorldTV99 without TV card - N900 got you entertained!!! JustWatch!

bun