4 of 8Image
LaCie's Little Disk holds 320GB of storage space. It works on FireWire 400 & 800 and USB 2.0.
Road Warrors need about 100-120 GB of space on an SSD drive that will start up your system in 1/4 to 1/2 of the time it takes a regular hard drive.
An Intel SSD drive.
Another option is a hybrid SSD drive/hard drive. The Seagate Momentus XT includes a 4 GB SSD that speeds startup while the disk offers capacities up to 500GB.