Microsoft Optical Desktop with Fingerprint Reader @ Officeworks $74.49
I like the idea of not having to continually type passwords. They bug me as I've got about 3 million of them. It does make me wonder though - what you do when the fingerprint reader up and dies, and I'm left wondering how the drivers for the keyboard, mouse and reader take up 60meg on your drive. But anyway - minor.
This one is in the officeworks clearance bin 50% off > Tech Products & Computer Supplies.