It looks as if other people (maybe many other people) are working on personalized/social network search applications.  Over at Smart Mobs, Paul Hartzon has a post today about NeuroGrid.  You become a node and start informing a network with better metadata about documents.

W3C's work on a "resource description framework" (RDF) browser is, meanwhile, sparking some negative Slashdot commentary today.  Sample:  "A network of random connections of semantic concepts embodied as URIs is just not a friendly form of data for humans to manipulate directly, and I don't think it ever will be."  But some people are more positive: 

Browsing metadata is the next frontier in the evolution of the web. Some of the other RDF browsers popping up include Gnowsis [gnowsis.org], MIT Haystack [mit.edu], and Fenfire [nongnu.org].

Get out there and find some metadata.  Meta is bettah.  I like this recent post heading:  "I'll have a Low-Fat, Soy, Social, Local Search Latte, Please."