I'd love to know what the upcoming services will be that will be included in SocialThing. A suggestions page would be nice. I'd like to have the option to include my friend's blog/RSS feeds (though as there is no "central" blog-SN, it makes things trickier, I agree), Seesmic videos, del.icio.us links, Google Reader Shared items.
Are there technical constraints preventing you from adding them, or is it just that it takes time? Would be nice to know what's in the works, what's not going to happen, etc.
Why can't we add generic RSS feeds to our lifestream? (this will be valuable when we have RSS for our lifestreams) You could implement some kind of claiming system to prove the rss feeds belong to the user... so that lifestream won't turn into a regular feed reader. ;)
We could then provide an image to act as icon and the title and URL would be specified in the feed. (or could be overruled by us entering other title/url?).