You know, Scuttle is a surprisngly full-featured PHP clone of del.icio.us. I say surprisingly because I first downloaded the latest release version from November, played a bit, and was just a bit impressed. Then, I downloaded the CVS version and installed that and got a lot more excited. I'm considering installing a version of it on my server and mirroring my bookmarks to it. Still checking out the other clones I've downloaded and installed, though.