I need to make more of a habit of rooting around in Quicksilver's plugin pane, as I almost always find stellar new tools each and every time I open it. This time around I stumbled on a Yojimbo plugin for Quicksilver that seems to do a better job of adding items to the Yojimbo database than the bookmarklets that BareBones added themselves in the latest 1.2 update. Tim Gaden at Hawk Wings agrees, and he even beat me to the punch with a post that elaborates how this plugin works, complete with screenshot goodness. Be sure to check it out for a needed tip on turning this operating into a Quicksilver Trigger.
After tinkering with this plugin, I am even happier that I uninstalled StickyBrain. The beauty of these actions is that, when adding or archiving a webpage to Yojimbo, this plugin doesn't force Yojimbo to the front, taking the focus away from whatever else you were doing. I don't know how these Quicksilver ninja developers managed to pull this off, as this is one of the main advantages over those new bookmarklets I mentioned.
I hope I speak for many users of Quicksilver and Yojimbo when I say: thank you, Quicksilver ninjas.