QuickPack is a fast and nifty way to access your Backpack account via Quicksilver. It comes as a Quicksilver action written in AppleScript and enables you to send various information to your Backpack site. You can write todos, notes, reminders, and create events in your calendars. QuickPack also supports Growl, a notification system for Mac OS X.
The Unofficial Apple Weblog raves about QuickPack.
After entering text mode in Quicksilver (generally with a period) you're able quickly to insert calendar entries, ToDos, notes, and reminders to any of your Backpack pages by prefixing your entry with one of the various supported tags (e.g. "+todo" and "+note"; see the QuickPack page for full details). Once you select the QuickPack action it will bring up another dialog box asking on which page you want your new entry placed. Select your page, hit enter, and you're done. It'll even give you a Growl notification that your new entry was successfully uploaded.
Related: Here's another script that lets you create to-dos via Quicksilver even faster.
