These are full web applications which you can play with. Note that they’re not necessarily fully production-ready, but they generally work more than not. If you’d like to use them for something more robust, feel free to contact me.
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Mnikr Prime
A web application reinventing the concepts of identity and reputation on the social web. This is highly ongoing work, but you can see the current incarnation at <http://www.mnikr.com>.
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YourData
A Facebook application to export your Facebook status into an RSS/Atom feed you can integrate anywhere on the web. There’s more detail at http://yourdata.ussjoin.com, and the Facebook installation page is at http://apps.facebook.com/yourdata. I wrote a blog post announcing it, which is available on the blog.