I just signed up for Y!Mash, the new Yahoo! Social network. It has features from just about all of the other social networks, which you would expect from any entrant into the field at this point- News feeds from Facebook, modules from Bebo, etc. I'm not really looking for another social network right now so the benefit is really how well this ties together yahoo features (and my existing blogs) easly - flickr, del.icio.us, y! music, etc. If someone is interested in testing it out, let me know and I'll send an invite. The site is in early stages, and nothing overwhelming, but it can't hurt to play around with.
Google is rumored to be coming out with a social stream that ties together the work you're doing on everything that Google owns - YouTube, Blogger, Google Docs, Picasa, etc. If only Picasa was as strong as Flickr...
I'm not sure why Google or Yahoo! hasn't bought Twitter, either, and rolled that into a powerful blogging platform. Right now I'm posting to Flickr, Twitter, Del.icio.us, and Blogger regularly, with other tools scattered in. These are the best tools to chronicle day to day life, and Twitter still and leveraged.
By the way - I got my invite to Y!Mash from InviteShare, the web 2.0 beta invite sharing tool now owned by TechCrunch. It took all of 30 seconds between me signing up and receiving the invite I wanted.
