commented here on h. "Wrt permanence, my own h. bookmarks and annotations flow directly into my local notes, through the h. API.
The h. software is open sourced, so theoretically one would be able to run their own instance of it. Except for the social function of it. Like you I follow Chris Aldrich annotations feed (which is how I ended up here), and several others. When others bookmark the same stuff I do but use very different tags for it, is where it gets interesting. Like years ago in the del.icio.us bookmarking service, the difference in tags signifies a social or sectoral distance. Basically you're finding a sliver of overlap between two different mindsets / contexts / interests. I then can add those people to the feeds I follow."