Although most posts lately have been just keeping-up with new mashups, there are new additions to the API database also:
Zvents: New start-up from a great team. Generating a lot of buzz at the Web 2.0 Conference this week. It’s an events ‘ecosystem’ with search, event creation, sharing and calendaring features. Given that Yahoo just acquired Upcoming this week, it looks like a great time to be a networked events service.
Tagalag: Lets you ‘tag’ email accounts (what can’t be tagged these days?). Also serves as a mashup showing tagged users plotted on Google Maps