Well according to Intel its Apple exclusive until late 2012 anyway, Thunderbolt that is, lightpeak is the other one that carries no power and looks like a usb connector. I sincerely hope the exclusivity thing wasnt Apple's idea...if so its a poor choice.
http://www.appleinsider.com/article...derbolt_as_exclusive_to_apple_until_2012.html
I think you've got it wrong. As I understand it, Lightpeak was its name while it was being developed. Thunderbolt is the name they came up with to market it.