My attempt to emulate a Dateline style calendar output in shell using my crappy ruby skills =] The script is in the geeklet but it is also at http://gist.github.com/410932 if you want to see it first/change stuff/whatever. This was mainly a proof of concept script that I could produce something mildly visually attractive and I will now be rolling this into my geeklets script with some customization options hopefully =]
The script requires no options but does color the current day's separator green(see screenshot). You can change that in the script or remove it all together if you wish. You can also change the separator characters.</strike>
Update - There have been many iterations of this script since uploading, but I've moved hosting to github (http://github.com/rjorgenson/geeklets-scripts). It has been updated to work with the latest version of OS X/Ruby and has many new formatting options.