Have you looked at the Western Digital Passport Drives? I use the 80GB for job delivery. They can be had for around $80 with free shipping on buy.com. Have had no problems with them and clients seem to like them.
[{POST_SNAPBACK}][/a]I believe the passport drives are USB?
I just purchased some OWC portable FW drives. I like how the case is made with a heat sink on the bottom. I bought the 200gig FW/800 7200 rpm version ... very nice.
They have many sizes and speeds ... with 40gigs under $100.
Here's a link
[a href=\"http://eshop.macsales.com/shop/firewire/on-the-go]http://eshop.macsales.com/shop/firewire/on-the-go[/url]