I'm thinking Apple will hold off and release the MBP in Q2. My understanding is that the Ivy will draw less power increasing battery life so I wouldn't be surprised if the MBA's came out right after the Ivy's, or even the day of (see: thunderbolt) But I don't know if apple would do a major update on two of their big sellers in the same Quarter (MBA 15" and a form factor change for the MBP's). Tim Cook seems more like a "let's keep our quarters even" type of guy, that Jobs never really was. I would also see them doing the MBA's first, because that's the ad funding. Most of Apples' funding runs, iPhone, iPad, MBA, iPod, and then the rest, and even the iPod is moving into the funding realm of "and then the rest". Apple is smart with that. Get them into the company with iPad/iPhone, and now you have a customer for life (see: camel advertising/nicotine). That's how they got me!