>ps--forgot to say thanks for adding those other extensions to the default list, and to ask that the quit button become a close window button like Safari and other OSX ap

We talked a little about this, and decided that it'll change when we're confident that LimeWire will not be a performance problem. We have a few things in the works that'll help to ensure this is the case.

The OSX Installer immediately asking for the admin PW is a 'feature' of Safari -- it automatically runs a package if it's the sole contents of the DMG.

Not sure what the WebMedia thing is -- most likely just a random client built ontop of GnucDNA.