We're planning on going October 2010. I have 3 kids, and something I started with the oldest was that for their 13th birthday I would take them to WDW. They get to choose the hotel and exactly *where* they turned 13. My oldest son chose Fort Wilderness and he wanted to turn 13 inside Cinderella's castle. Since he was born at 11:55 AM, I made lunch reservations for Cindy's. Nine years ago, Cindy's was still a really nice restaurant, and they made such a fuss over Austin! He loved all the attention from Cinderella!

We had such a fun trip!
With my daughter, we stayed at the Poly and for the life of me I can't remember where she wanted to turn 13, but she was born at 5:01 PM so that was do-able. Chef Mickey's, maybe? Another fun trip.
With my youngest son, he wants to stay at the Contemporary, and I don't know how we'll deal with "where" he turns 13, because he was born 43 minutes after midnight!
These birthday trips are not full-blown vacations; we live close enough that driving is easy and their birthdays have all fallen on Thursdays, Fridays, or weekends so they don't miss much school.
I look forward to scoring a great package deal and planning a fun trip. I'm hoping that my oldest son will be in the College Program then!