Something Matt's talked about doing...in the context of 'some day'...is building a gingerbread cathedral.
He's unlikely to have time for it this year, but don't let that stop you.
And while you're at it, why not enter Wilton's Gingerbread House Contest?
It's fun, and you could win all sorts of great prizes, including a trip to Disney World!
So, go ahead...start building!
(Rules can be found here)