Does Anyone Use an eBook Device?

Vulgrin the MAD asks: "I've been interested in ebook / datapads for a while. I can't wait to get rid of all of this paper I need to lug around. While the Palm Pilot is great, I'm also looking into ebook style devices like the Rocket Ebook. Has anyone used these devices and what are your thoughts on this technology? Do you think its in prime time yet, or should we let it get settled down some more? Also, how long do you think it'll be before 90% of all works are published electronically, along with paper? "