Google Labs seems like the place to mesh creativity and science. Experiments are going on all the time. That would be the place for me. I viewed many of the lab ideas and was impressed.
I like the idea of Music Trends. Here you can get lists of best selling artists from around the world.
Transit seems to be a tool worth developing. It includes cities and countries tourists frequent. It would work well with Ride Finder. Customers could use these sites to make one good mash-up. Patrons could book transportation before going on a trip or to find shuttles after arriving at their destinations.
Suggest, I think is unnecessary along with Trends, and Related Links. These tools duplicate functions that are already in existence like MySpace and Technorati.
Ride Finder and Transit would make swell graduates from the Lab. Go Google Labs !!!