Pascal Van Hecke – Daily Links

really simple plugin that redirects your WordPress searches (?s=search-term) to the pretty-looking URI version: /search/search-term, and also converts spaces (%20) to plus symbols

Niall Kennedy took up the task of rewriting Twitter frontend on Google App engine, using Twitter's api and probably some screenscraping.
Reads as a checklist for localisation, usability, seo and caching. Not sure whether Twitter will like a copy of its site with advertisements though.