Here’s something I just figured out: although you can’t easily change your user shortname in OS X, you can change the case of your home folder without adverse effects, assuming you’re using the default file system. Thus “jason” became “Jason”.
Precipitate is a pretty nifty new open source tool that makes Google Docs and Google bookmarks searchable via Spotlight on your Mac. The only problem? I tend to find everything using Quicksilver.
Solution: add /Users/[user]/Library/Caches/Metadata/Precipitate to your custom sources in the Quicksilver catalog (or add the next folder down, if you like.) Under source options set [...]