The browser runs quitely in the background while you get on with your work. As soon as you want to do some browsing you make a mouse gesture - moving the pointer from the very edge of the screen and back again - and up pops Ghostzilla. Not as a new application though - it appears in a space within the application you already have open. So for example if you had Outlook open it might appear in the inbox list.
Nice. Also it renders in soft monochrome so it doesn't stand out - and pictures only appear (in B&W) when you hover over them.
To top it all off the browser disappears as soon as you move your mouse out of it - returning you to stealth mode. At this point the other developers at work and I were very very impressed. Even if you don't have a need for this much secrecy it's worth using just to see it in action.
There's more though. If you buy the CD version rather than using the free download it doesn't even install (other than a few encrypted config files) it runs off of the CD so no-one will even be able to see you were using it when you leave your PC (as long as you remember to take the CD with you!).
Quoting myself on the topic of Ghostzilla yesterday - "this is the best thing since sliced cheese" - I was a bit drunk so forgive an element of nonsense but this really is an awsome piece of software to see in action.