Noblog is a Ruby on Rails application that I wrote to collect and organize my various online assets. This website runs Noblog.
I have videos on YouTube and Vimeo, photos on Flickr, Tweets, and blog posts. Noblog pulls all of these sources together, organizes them by time, and presents them in a clear list format. There is a simple commenting function to allow for a minimal level of communication on the site.
Noblog's sources are configured using a YAML file, so it is easy to fetch stuff that's not just mine. The set of possible sources may be extended fairly easily since Noblog's core is not married to any particular type of source or its particular metadata.
Noblog may become an open-source project if there is interest. Interested? Email me at zs [at] thenobot.org!