Dj,
Welcome!
I had the pleasure of going to MVMCP in 2001. Would I go again? In a heartbeat.
Picture a snowfall up Mainstreet, most of the E-ticket rides open, short lines (I think they limit it to 20,000 - 25,000 people in the park) free hot cocoa and cookies, souvenir button and souvenir photograph that greets you when you get home from your Disney Trip.
Oh yeah - did I mention the spectacular fireworks?
As for them selling out we bought our tickets in August and had our pick of nights. I haven't yet seen the schedule for this year. I'm hoping to get to WDW this Christmas again. Last year, according to another website (wdwig) only one of the days sold out.
Hope this helps!
Rick:wave: