Anand Lal Shimpi takes a look at Intel's Core 2011 mobile roadmap, you can check it otu over here.
Like the desktop offering, mobile Sandy Bridge will arrive sometime in Q1 of next year. If 2010 was any indication of what's to come, we'll see both mobile and desktop parts launch at the same time around CES.
The mobile Sandy Bridge parts are a little more straightforward in some areas but more confusing in others. The biggest problem is that both dual and quad-core parts share the same brand; in fact the only indication that the Core i7 2720QM is a quad-core and the Core i7 2620M isn't is the letter Q. Given AMD's Bulldozer strategy, I'm sure Intel doesn't want folks worrying about how many cores they have - just that higher numbers mean better things.