RTI has released their Virtual Panel for Microsoft Windows and they will soon be releasing iPhone/iPod Touch/iPad integration as well. Unfortunately, soon could be 6 months out.
This would require a pro to program though because it's dealer only software. It will also require an XP-8 processor and they aren't cheap. Maybe you should look into Bitwise Controls. This would probably fit your budget better but you may have some limitations. I'm very familiar with RTI but haven't worked with Bitwise so I can't answer any questions there. If I were you, I'd start researching there and see if it's a viable solution for you.
As far as minimal to no wiring to the TV's, you aren't getting NO if you use an iPhone because they can't emit IR. You would have to run a cat-5 or some type of 2 conductor cable at the minimum to each display.
There are other IP control systems out there as well so maybe someone else will chime in with another "possibly better" solution.
