Have been, that's why I finally posted an asked. Suggestion on how to modify the query to include blog posts (or include all content types)? would that be too server intensive? I may be able to satisfy by simply adding a link into my "new posts" drop-down that provides a direct link to the "new blog posts" alongside where it says "new group messages" (see attached image).
I think you would need to keep the original query and then do a new one to grab the blog posts. Then merge the two resulting arrays and sort by date and then spit out the results. I don't really know if that would be easy or hard.
(Couldn't you just use the Activity Stream for this and only track posts and blogs?)