Honestly, the things they make to plug into a USB port these days. It used to be that if you wanted enterprise-level security then, well, you'd probably need to be an enterprise with the budget to go with it; otherwise you wouldn't be able to afford the chunky server that would scan all incoming and outgoing traffic from your network. Now Yoggie are offering what they're calling a Linux security computer on a USB stick, promising internet blocking and traffic monitoring without load on the host computer.
$179 gets you twelve security applications - including firewall, anti-spyware and anti-virus - through which all network traffic is routed before it gets a chance to molest your computer. Working with LAN, WiFi and Bluetooth connections, updates are checked for every five minutes through an encrypted channel.
Inside the glossy shell is a 520MHz Intel XScale processor and 128MB of RAM, while name-brand software (including Kaspersky and Mailshell) handles all the checks and intrusion detection. Shipping on the 10th June, it comes with a one-year subscription; there's also a Pro version that includes a secure VPN client for $20 more.