Review my project: SitesInCommon
qeorge: I've installed the userscript and I like it, but your homepage made me think it was a different product. I thought it would scan my bookmarks or social profiles for sites I visit, and match me up to other users that way (maybe it does and I don't see it?).Also, it would be nice to get more information before being presented with Sign Up and Login as the only options (on the homepage). Its hard to choose either without knowing how your product works and what value it will bring to me.I do like the locations on the HN comments though. Pretty cool.One other thing: I have Greasemonkey, and very much appreciate your offering the product as a Userscript. That said, a lot of people might not have GM, or even know what it is. Perhaps package the script into an extension and offer both options? (http://arantius.com/misc/greasemonkey/script-compiler)Best of luck!