Well, according to DigiTimes, Montevina will be launched in May. WWDC is traditionally in June, so....this adds up to a possible MBP revision at WWDC. With new features on MBA such as the new trackpad, new magsafe adapter design and evidence that Apple is standardizing the MacBook keyboard on all computers, I can only imagine that MBP will indeed receive a major facelift for its next revision. the relative short timeframe between now and May also explains why Apple has been reluctant in terms of launching a Penryn-based MBP (it may still happen, but will be a relatively quiet release with little fanfare)
http://www.digitimes.com/news/a20080115PD210.html
http://www.digitimes.com/news/a20080115PD210.html