With all the UNIX flavor that OS X has, its kinda frustrating that Linux users can have this cool feature whenever they want and we can't. 
I seriously would like to have this...

Embed Terminal on Desktop

Tried geektool myself... I liked it but it works as something to display stuff through the terminal... like an activity monitor. I admit, its pretty nice and give the OS that techie look which is always cool, but like I said, Linux guys are able do more and are able to have other awesome features on their operating systems, but we cannot; even though we have the same UNIX power..