Enter FlexTD from flexgames. It's another unitasker, but it does one task very well - just hit a pre-defined hotkey and it brings up a transparent edit window. Type in your to-do, press return, and the info is entered into your favorite Mac calendar app.
One suggestion for the developers; the hotkeys only go up to F8, and I'd love to be able to assign something to F13 through F19 on my keyboard. How 'bout it?
The app is free, appears as a pref pane in System Preferences, and can start up at login. Many thanks to flexgames for a nice productivity booster!
Tip 'o the TUAW homburg to Elsa for the news!