Thwart password-hungry keyloggers with a Greasemonkey script
Install Virtual Keyboard Interface and double-click any text field, textarea or password field to display it. Instead of typing on your keyboard, just click the virtual keys.
It works almost everywhere, including fancy Web 2.0 Ajax forms.
This is an excellent script to add to your Portable Firefox install for use on unfamiliar computers. For example, the one some friends of mine used in a hotel lobby that captured an email password and ultimately allowed a thief access to their bank account.