Where are my posts?
Infolets has a smart comment system that shows you all the posts by a contributor. Yet, the only place where I saw it on their site was while previewing my own comment. It relies on their search engine. Metafilter has it too, I'd like to see it elsewhere, if only to keep track of my own posts. Deja did it for Usenet, now how do you build a unique data perspective on people, when comments are spread around dozens of web forums? You might want to avoid such an easy way to expose everything you said though!