Clickfree is a company making some interesting and simple USB-based backup products, and their latest Transformer for iPod/iPhone may be the most clever yet.
Clickfree's new external SSD comes in 16GB ($80), 32GB ($150), and 64GB ($250) capacities. Roughly the size of a credit card, the Traveler is a compact but pricey drive.
Polaroid's ClickFree backup drive is supposed to let regular people back up the data on their hard drives just by plugging it into the USB port and hitting go. They plan on releasing two versions, one standard (which backs up all data on your drive) and one photo oriented (which searches and only grabs the photos).