I couldn't resist playing New Vegas early, but the only option was Xbox 360, sadly :(
I am wondering if you can bring your 360 save to PC via a USB device and use it on the PC version like you could with Fallout 3. I have a 30 hour save on 360 but I intentionally avoided doing the main quest just in case you can't port over saves.
It's very simple, just stick a flash drive in your Xbox 360's usb port, copy over the save file to your flash drive, then put the flash drive in your PC and use a program to copy over your save file from the flash drive. I recommend Modio. Drop that save file in your PC's Fallout New Vegas saves directory.