I read that for 2009 Mickey's Not-So-Scary Halloween party, costumes are for ages 12 and under?

Not true. It's all ages. It's pricey, though. My friend and I were going to go to it while we were there but it's an extra $50 or so http://disneyworld.disney.go.com/parks/magic-kingd...

We went to the Mickey's Not-So-Scary Halloween Party twice while our daughter was in grade school. After that we couldn't take her out of school anymore, or she would miss too much. When we went there were adults in costumes. My husband & I wore costumes too. I'd say that at least half of the parents wore costumes. We all had a great time!

Nope, everyone is allowed to wear costumes at the Halloween Party if they choose to! Have a great time

actually its quite the opposite. the only time people over the age of 12 are allowed to dress in costume is during the mickey's not so scary halloween party. the rest of the time only ages 12 and under are allowed. that is cuz they don't want little kids walking up to older kids and adults thinking they are one of the cast members.

Everyone is allowed to wear costumes.