Microsoft's Photosynth is an impressive tool for stitching together dozens of photos to allow a place or event to be viewed from multiple angles.
The only hard part is it really takes 75 photos or more to get the optimal experience. That's a lot of work for one photographer. But, with big events, one can also rely on crowdsourcing. Which is what CNN has done with the inaugural, asking viewers to send in their photos of Barack Obama's swearing in.