Keepstream cropped up for me at this year's SXSWi conference. I'm not usually an adherent to social web tools like this one, as there tends to be too many promises and not enough action. With Keepstream, so far so good. You can follow my updates here. Here's their blurb:
Keepstream is a social media curation tool that helps organize tweets, Facebook posts, and website bookmarks into shareable, embeddable collection pages. Collections are useful for bloggers, marketers, or just about anyone who wants to curate the chatter from a conference or event, a news headline, or a hashtag chat.