If you use a lifestream service like Friendfeed , Profilactic, etc…you can generate a similar widget, and some stand alone services like ShowYourself and others, but retaggr is more than just a profile aggregator widget, it’s a contact and information card, it even contains your latest tweet. This widget is deeper than just one page, if you click the mail icon it turns into a contact list page, and if you click on the email icon it will turn into an email form. If you click on the Twitter icon it displays your latest tweets, in fact if you click on most of your profile icons you can read the latest entries in the retaggr widget.
If widgets take up too much space for your blog, then you can use a button instead, and it will activate your profile card when you click it or hover over it. There is also an email signature version of your profile card (mine is missing my avatar for the moment). There’s another feature where you can retaggr enable your site, this way other retaggr user avatars will appear in comments, and certain words in your posts will be hotlinked to retaggr information.
There are a few more features to check out like searching for other retaggr people.
Here’s my retaggr:
Here’s the mouse over button:
Here’s the clickable button:
I just noticed that the bottom of the profile card widget has a link to get some embed code, and one is to your profile page on retaggr: