[Newbies] package browsers

Hi,

What is the difference between the "Package Universe Browser" and "SqueakMap Package Loader"?

On a related question, I'm trying to understand the difference between packages listed in SqueakMap/Universe Browser and those listed in the "Monticello Browser". I understand that Monticello is a version control system which contains the latest although not necessarly stable release code whereas the packages listed in SqueakMap/Universe Browser should link to stable releases of the code. Is this understanding correct? Is packaging part of an image release cycle or a separate process?

Thanks again

Nick