I’ve just come across dash.
(free in mac app store :  http://itunes.apple.com/us/app/dash-docs-snippets/id458034879?mt=12)
And I thought you might like it.

It’s a snippet manager and an API documentation browser for Mac Os X.
Access to documentation is really fast (a nice improvement from integrated documentation browser inside XCode.)
As I use different languages (ruby, Objective-C, javascript), I find this unified interface handy.

Snippets can be created and shared (via a dropbox folder) inside a team.
(They will appear as search results)

Here is what it looks like :