I see, however the wikipedia article mentions that there was a fully functional lightpeak working computer on display. And it says we can start seeing it built into computers as early as 2010, yes i know that could mean at the beginning or end. But maybe they will put the hardware in the computer, and then update in late 2010 so it will be usable?
I doubt it's software that's not ready. The prototype was in a Mac Pro, so it probably isn't small enough to fit in a MBP yet. LP components may require new manufacturing processes to fit in small packages, for example, producing an IC that also emits light would allow LP on a single chip, but it might require new manufacturing equipment. Also, since LP isn't an industry standard, it's possible that Intel doesn't have the design finalized yet, and isn't going to start producing hardware until they are happy with it. Once Intel has hardware ready for mass production, they have to give it to Apple, and Apple has to put it in their next MBPs, which typically takes a few months.
I don't know all the details about LP, but if it is radically different from anything out there now, that might be part of the delay. If, for example, fiber optics have to be run inside the computer case that adds an extra element of complexity for the computer manufacturer. If it just works like SPDIF, though, it should be easy to add to any computer since the port just has an emitter, and the signal travels electrically across the motherboard. The reason I suspect LP might be different than SPDIF is that the prototype did have fiber running inside it.
Last I heard, LP is expected at the end of 2010. It Apple adds it to the next next MBP refresh, it will probably take off quickly and it won't be long before enough peripherals are available to make it useful.