Fats, the Rio 600 and 800 have a backpack system which allows you to slip various memory backpacks onto the player.
The player doesn't care what's in these backpacks, be it a clik disk, flash card, or IBM MicroDrive. The bad side is you can't place the media in the backpack yourself, you have to buy the backpack with the media in there.
Backpacks with 300+ meg IBM MicroDrives are already on sale, and the 1gigs are coming soon. It'll be EXPENSIVE.
I would suggest going for Iomega's HipZip, driven off of Clik disks. The disks are extremely tiny, cost $10 for 40 megs ($1/4megs) and are rewritable. (They're SMALL! About 1 inch x 1 inch, and about 1.5 mm thick). Flash memory costs about $2/meg, so using the Clik disks is EIGHT TIMES less expensive than flash.
Also, the Kanguru is NOT portable. It requires an external power source.
[This message has been edited by RichardS (edited 01-01-2001).]