Not a huge deal, but the creatively named "shared stuff" *sarcasm* is down (for global mode) right now (i don't know if this is even new)--

http://www.google.com/s2/sharing/stuff?lmode=global

Usually when they release parts of services, they aren't left incomplete for so long. It should have been fully released by now, don't you think?

No, it's not down. They disabled the pages that contained the most shared pages from a site or globally (I noticed there were a lot of adult videos hosted by Google Video). The shared stuff from individual users are still there:
http://www.google.com/s2/sharing/stuff?user=103588655491600728393

Someone correctly me if I'm wrong, but Shared Stuff was never officially "released." In other words, it never was mentioned on an official Google blog. It was discovered as a "Share" link on Google Video. Maybe it was put there as a way to get some limited early adopters testing it to help with OpenSocial type efforts? What direction could Shared Stuff be going in? Thoughts?

<<What direction could Shared Stuff be going in? >>

That's easy. Sergey Brin mentioned at some point that there's no consistent interface for sharing things and that every service has a different UI/functionality for sharing. Shared Stuff will probably be implemented in all Google services (share search results, share photos, share documents etc.) and will also be available as a widget for third parties.

It has to be integrated into the Toolbar like Notebook was.

Google Notebook started small. It'll probably pick up soon.