I'm looking for some removable storage, primarily for distro-isos.  I
don't want to store them on the laptop, but I do want to keep them on
some removable device that I can plug into the laptop and transfer the
needed isos.  Nows the hard part.  I have a couple options that look
promising. 

1.  USB 2.0 hard drive.  I'd need to get a pcmcia card for this and
figure out how big a storage unit I would need.  I've read the USB 2.0
support document (thx tim) and other than the support for the actual
pcmcia card, this looks like it could work well with (probably) only
minor issues. 
2.  I ran into a neat little toy at CompUSA that uses a Firewire
connection and allows you to basically have an external IDE bay.  This
looks promising in that I can get a standard HD (much cheaper than the
USBs, or laptops), and if I needed to do more storage options, any IDE
device would hook up to this.  My problem with this is Linux support. 
I've never heard of this device before, and I don't know how linux would
use this.  Would it be loaded as an IDE bay, or would I have to mess
with FireWire settings and such? 

Just wondering if anyone here has any advice for some removable storage
on a laptop, or just want to share some success/horror stories.

Thanks again.
Chris Frederick