Q: If they are using Beacons in any way, where would they be stored?
They're stored in your browser's cache. They're mostly used surreptitiously for tracking, but web beacons such as Omniture (Adobe Analytics) have a functionality beyond that (which can foil your access to many sites).
You can check out what's being stored on your machine via about:cache (Firefox; I don't know about Safari) or via the CacheViewer app.
This was a forum topic some time back.
