Been skiing for 20 + years, although lately much less than in years past.  Mix it up with a couple years doing terrain park freestyle, the rest alpine racing.  I grew up at a little place in Western NY called Bristol "Mountain."
I tried boarding once or twice, but was simply not impressed.  The three main reasons I will stick to skis:
1.  Speed.  I don't care how many people say "you can go fast on a board!"  Yea, you're right.  Good luck doin 60 mph down a super G course and maintaining control on a board, though.  For me, controlled speed = fun. 
2.  Versatility.  As mentioned earlier, I can get through tight places with greater ease, and flats are not a problem.  Also, (P38 drivers pay attention here) if half your equipment fails you're not completely screwed. 
3.  Style.  I don't care how cool a 720 nose grab looks on a board.  It will, in my mind, ALWAYS look better on skis simply because there is so much more going on.  Make it switch and mix in mute grab, and you've got one BA looking trick.  However, I don't have the cajones to attempt it these days.   

That being said, I'm glad to see boarding has made the progress it has over the years.  A good deal of people really enjoy it, and as Anax mentioned, a lot of the technologies are mutually beneficial.  I just wish the X games and other events would quit putting boarding events in the prime time slots.   
