A pre-release, developer version of Quicksilver is available with a seriously revamped preference pane. Also included in this not-ready-for-prime-time release: a new Triggers system that allows for groups, a revamped plug-in pane with categories and "droplets," which you can read more on here. I'm sure there's more hidden under the hood of this release, but finals are trumping the amount of time I have to tinker with this stuff.
Since I just know some of you are going to ask, here's how to get your hands on this developer preview edition, but please do not bug us if things get wonky; it's an unstable dev edition. You have been warned: Go to the Application tab in Quicksilver's preferences and change which version it checks for updates; I believe it's actually called 'developer preview.' Then tell it to check for an update and you should be able to snag the new version. Enjoy.
[via Hawk Wings]