Hello, Woody!
Most of the Pocket eDGes will probably ship with Android 1.6. That is the latest official, finalized version of the eDGe OS (known as Dingo). You might find some PEs with earlier operating systems, and you might find some used PEs that have been upgraded to Android 2.2 (known as Ermine, which is a beta release from enTourage).
Because Ermine never made it past beta, it is not perfect and therefore might not be considered "safe". However, many people have successfully upgraded their eDGes (myself included), so I would say Android 2.2 (Froyo) is the answer to your question.
This forum is where you will find your how-to answers. The sticky threads at the top are very helpful, and the more time you spend reading both old and new threads here the more you will learn.
Good luck and happy browsing!
