In order to move this format and effort forward, there a number of things that need to happen. This wishlist is designed to capture and enumerate many of those things.

Platforms

OpenSocial

WordPress

Drupal

Sweetcron

Companies

Google

Yahoo

MySpace

Netflix

New York Times

The TimesPeople feature should support activity streams for user recommendations and comments.

Plaxo

Plaxo currently consumes activity streams but needs to emit them.

FriendFeed

FriendFeed should emit and consume activities streams.

Facebook

Need Facebook to emit and consume activities in a way that complies with the spec. They currently emit activities.

Smart.fm

Smart.fm supports emitting activity streams (need to find their docs).