We got married in Austin, but live in DC. I can't imagine picking a better place. In Austin, the prices were a lot lower than DC, but it's still big enough to have a great selection of vendors. Vendors I can't recommend enough are Carey Limos and Laguna Gloria. Our planners, 36th Street Events, also did a great job, especially on the day of.
Nice enough hotel, and they've just renovated. Service was somewhat inconsistent -- we had a great experience with one of the concierge, but the front desk was often disorganized. They screwed up the room block twice, and then tried to tell me I had to wait until Monday to resolve it.
The food was good, as were the drinks. The next room over had a band of bagpipers which were a little distracting, although the ring bearer loved it. :)
Click on each tool to see a sample.