Thanks everyone for the interesting and some high aiming (eleseur) ideas . I used OMP long ago need to look at it again.

I would definitely want to get a BT stereo. I started doing something interesting (to me) with my N900. I installed Fuppes and started streaming music to my Nexus 4 over wifi and was even able to stream my music on N900 to my TV from Nexus 4 I was wondering if we can create a uPNP server from my N900 without wifi router or anyway to stream music to my Nexus 4 while in car? I don't know if it makes any sense but just asking.

I installed Modrana, I don't have any sim in my N900 was wondering if the Maps are reliable because the maps on Modrana website say they were updated in 2011.