This Freecom pen is very stylish and small, just 7cm long, 3cm thick and 2cm deep. It's no wider than a USB port. Altogether it holds 16GB which is really good. If you're wondering what can I do with this then you can put on portable applications, like Firefox and many more applications. You can also use it to save data and media - especially good if you want to get a file to your PS3, Mac, PC, or Linux computer.
This comes in a simple hard plastic shrink wrap (like SD cards) and is very basic. You get a card telling you a few things like where to get Windows 98 drivers etc.
This is an excellent pen, I've not had a chance to test ReadyBoot, but on Windows it's easy to transfer files and the cap is easy to put on and off. It's even able to be put on your keyring, so you never loose it. Transfer speeds are your usual 25mb/s which is OK I guess.