Attending the Evans Data Developer Relations conference on Monday, I was lucky enough to find myself sitting next to John Musser at lunch. John is the founder of ProgrammableWeb. Embarrassingly (and probably because I’m relatively new to the cloud API scene), I’d never come across this website before. The site attempts to provide an up-to-date directory of mashups, web APIs, and related news.
If you’ve not visited the site before, then its worth taking a look. The API lists will likely give you some ideas for mashups and integrations you could play with.
BTW John gave an excellent and very informative presentation at the conference on API business models.