Not on a Mac Rated 4 out of 5 stars
This is a very nice app for Windows. I tried it on my new Mac running Snow Leopard, however, and the clock was nowhere to be seen. The date/calendar was there. I tried the about:config fix (although I realize it was to address a different problem), and all that did was make my security button disappear. Interestingly, I got the security button back by installing Organize Status Bar.