Those darn Quicksilver guys just won't quit coming up with cool new stuff. Here's one that I read on LifeHacker today. One of the "missing" features in OS X is the ability to create new files from a template from Finder (you know, in Windows, you can right-click and say "New Word Document", for example). You can do the same in Quicksilver, but you get to/have to create your own document templates. The procedure is described here. The advantage is that you get to decide what types of documents for which you want templates, unlike Windows, which spams all kinds of new types onto your right click menu.
Quicksilver: no safety in numbers