This is my brother's house in Benton Harbor, Michigan. It's a work in progress! It's gorgeous just as it is and very fun to explore both in person and via Photosynth. Even the attic and the basement are cool.
Normally I wouldn't recommend synthing 1700 images, but I decided to give it a shot because a) I was curious to see if it'd work and b) to show off the capabilities of the new highlights feature.
Obviously it did work so check on that front (I borrowed a few hours on a server with 8 cores and 8Gb RAM if you're curious). Finding your way between rooms without the highlights is difficult, it's so much more fun to just click the highlight buttons and fly there! The enormous size does expose the limits of the Photosynth viewer though, it just wasn't designed to scale to this level and sometimes it's slow even on a modern machine with a fast connection. I'd recommend 500 or 600 images as the upper practical limit for users to have a good viewing experience and 300 is even better.