That was exactly what I was looking for, an easy to use command line tool for managing multiple ssh sessions at once. No, not Jellyfissh only managing your credentials. Something more complex, managing multiple connections at once like PAC, but w/o the GUI and easy to install Mac OS X systems, was needed.
The tool of choice for anyone managing multiple servers at once while using a Mac OS X 10.5, 10.6 or 10.7 operating system is: csshX – a Cluster SSH tool for Mac OS X Termial.app! Simply download, extract and copy it to /usr/local/bin – works! You may then start scripting your connection groups pretty easy!
That really is a great piece of software, have fun!