Enjoy the trip. The advanced/expert guide book will help you uncover lots of terrain: http://www.quickdrawpublications.com/Whistler%20Advanced.htm The Whistler Blackcomb 3d map for iPhone/Android is also phenomenal if you need to figure out how to get to an area on the fly.
Some famous runs are Dave Murray DH (an olympics run) on Whistler, Sudan Couloir/Couloir Extreme (steepest named run, in theory) on Blackcomb, various bowls in Spanky's Ladder (I strongly suggest going with a guide) on Blackcomb. Blackcomb seems to get about half or a third of the skier traffic as Whistler, so I'd spend weekend days on Blackcomb, and explore Whistler midweek.
Peak2Peak is the longest hanging structure in the world. You can take a car with a glass bottom--just wait in the separate lineup. There are two of them, so they should cycle through every 11 minutes or so.
Araxis is the premiere restaurant if you want to blow lots of money. Rim Rock is also nice if you don't mind riding out near creekside. Furniture Warehouse might be the cheapest restaurant now, barring specials elsewhere.
For lift tickets, buy an EDGE card if you're Canadian or a resident of Washington state.
While this specific advice won't help you (and if you get a storm front it's a moot point! Let's hope for the best!), I recommend people book vacations in Jan or March, as Feb is historically a low snowfall period. Alternately, book for mid-April and take advantage of their late-season deals including unlimited ski passes at highly discounted rates.