Any security benefit to using WinUAE?

[Merc]

Try this instead:

http://www.vmware.com/vmtn/vm/browserapp.html

It runs inside the free VMWare player, and you can set it to not remember any of your personal info, etc between runs.

Not as cool as using UAE, for sure, but you get a modern browser (Firefox 1.5) and it's easier to set up.  Just download the player and the browser appliance image!