The reason I would probably not subscribe to Shorter entries/status updates (like Twitter) is because it would be annoying to see so many single or double line entries with the fervor that twitter is updated with.
If they were in collected form, it would be fine on my circle, but I also feel that this is a prime candidate of something that could be worked into the profile - showing the last update with privacy settings the same as an entry on a field in your profile, and clicking on the header for that taking you to a backlog of all the small status updates.
As far as Bookmarks or collections of links - I really love the way Google+ handled it before I deleted my account with them. If you entered a link into the entry, it auto-populated the entry with a small blurb and image of the site or company you were linking. It was fantastic. It made sharing even a single link feel like there was some content behind it.
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If they were in collected form, it would be fine on my circle, but I also feel that this is a prime candidate of something that could be worked into the profile - showing the last update with privacy settings the same as an entry on a field in your profile, and clicking on the header for that taking you to a backlog of all the small status updates.
As far as Bookmarks or collections of links - I really love the way Google+ handled it before I deleted my account with them. If you entered a link into the entry, it auto-populated the entry with a small blurb and image of the site or company you were linking. It was fantastic. It made sharing even a single link feel like there was some content behind it.