I'm interested in Plastic Logic's product (
www.plasticlogic.com) but I don't know if it will ever see the direct sunlight of day (intro is projected six months late now). Once and if it does, I'm sure it will have its bugs and limitations (don't we all). For the scientific docs I read I need a little more real estate than my Sony 505 offers, so I'll wait until early 2010 and see how the Plastic Logic reviews go before I buy the iRex. The iRex has been on the market for several years and it is a great product, but Plastic Logic has a larger screen and is thinner and lighter. The iRex require$ ju$t one little compromi$e on the part of the buyer, but you do get a lot for your money.