Got API, an API documentation aggregator

I use this everyday. http://beta.gotapi.com/ is the slightly nicer, newer version.

This is an "API documentation aggregator" not an "API aggregator"

An API aggregator would be very welcome!

Definitely would be useful in some cases. But not many site's APIs have a good delegation of rights scheme, so an aggregator (which would then use your raw API credentials to all these places) would have to be a very trusted entity.

Gnip is pretty interesting...

You mean kind of like YQL? http://developer.yahoo.com/yql/console

Fixed.

It would nice to have the ability to add custom api documentations - it would make interfacing with internal api's much easier