With so many different services out there, how do you definitively claim certain social networking sites, blogs or other content as "yours"? This can be especially difficult if you have a common name! There are a couple of different services out there to help you with just this problem. The one that I use is called Claim ID and it is both useful and social! With this site, you can enter in all of the MySpace, Facebook, Flickr, Twitter and blog accounts you have and "claim" them as your own.
Why would you want to do this? It gives you a way to exclude blogs/social sites that may have been made by someone with a name similar to (or the same as) yours - which in some cases may be necessary! Part of protecting your online privacy is protecting your online reputation. It also gives you a starting point to let folks know what it is you have done on the web. With so many of us creating so much content, it is easy to have something you have done or created fall through the cracks. This site will allow you to point people to a single page with all of the cool things you have done so that nothing gets lost.
Claim ID is pretty easy to use. Once you have set up your account, you can add links to it. When you add a link, you are given several options. You can enter the title you want to give to that link, the description that will show up, tags for it as well as classifying it either about you, not about you or some other classification that works for you, then classifying it as by you, not by you (with the option to add the author) or in some other way that works for you. You can create groups - work stuff, personal stuff, any other kind of stuff - that help you to arrange your information the way you want it.
And that is the point of this new sort of service, after all - to give you the opportunity to manage your online identity, reputation and what exactly you want to "claim" for yourself!
One final note - you will see a lot of information on OpenID at the Claim ID website. Even if you don't feel you create all that much content (which you will be surprised once you start trying to add it all in, I bet!), you can use the Claim ID service as an OpenID provider. A nice, only slightly technical, explanation of Open ID is found at openid.net. Take a look and see if it might help you with your expanding username/password combinations!