We've just found OCZ's Lightfoot external SSD at Intel's CES 2012 booth and brought some photos back for you. The drive is much smaller than your typical external hard drive, but, most importantly, it's got a Thunderbolt port. While that I/O is known for its proliferation on Apple laptops and desktops, this drive will also work with PCs as they get the high-speed port (the ThinkPad Edge S430 is the first and hopefully not the last).
The Lightfoot itself is light and has a rather attractive aluminum shell. The whole package is very light and it seems like the drive will stand up to the rigors of being tossed around in your backpack. Unfortunately, there's no pricing or availability info yet, though we have heard that there will be 128GB, 256GB, 512GB, and 1TB capacities. We'll let you know when we hear more.