AppleInsider says Apple is "actively" poking Sony (as opposed to other BR manufacturers) for slot-loading Blu-ray drives for MacBook Pros—Apple supposedly even wanted to offer BR SuperDrives with the new Penryn-powered machines, but "quality issues" meant Sony could only deliver combo drives. Apple said shno thanks for now.
Reasonably, summer wouldn't be a bad time to expect them to come through, especially with the even more efficient Montevina chipset to offset Blu-ray's battery-killing nature. But, Apple's official support for Blu-ray has been completely non-existent despite its exceedingly long rumor half-life.
On the other hand, Blu-ray's victory logically means we'll see them populating more computers in (sorta) short order, now that the risk of shipping machines with $300 drink holders is gone. [AppleInsider]