Not sure whether you are USB or and eSATA type… don’t choose… get both. The Kanguru e-Flash drives have both eSata and USB on the same flash drive.
The eSATA is powered, and Kanguru tossed in a eSATA + Power bracket and eSATA + Power cable for whichever scenarios might present themselves.
The Kanguru comes in a 16GB ($85) and 32GB ($120) model, and will add a 64GB version in January of 2009.
As with most technologies… they get faster and cheaper… so it won’t be long before eSata is the new USB.