Now this is supercool! Via slashdot (discussion) comes a Windows firewall squeezes on a USB key. The "windows" part of is is a bit of a misnomer though, it's actually a firewall running linux as the core and a bunch of security applications on top of it, but currently it only works when plugged into a Windows host.
It sounds like the system grabs network traffic as it comes into the windows host, does the happy-happy firewalling stuff, then passes things back to the host. Linux and Mac drivers are planned.
Check the screenshots midway through the article too, very sexy graphs!
Hmm.... firewall on a small host, I wonder where I've heard of those before? :) If anyone remembers the cool project the dot-com I was part of that created the firecard, we did something similar, or at least, kinda similar. At the time we used RJ45 jacks (like Yoggie Systems' previous version) and we were on a PCI card instead of a USB key. OK, maybe not that similar then....