Does make you wonder if it's worthwhile upgrading to the 505. Doesn't it do better with PDFs all the way around and isn't Google making its books compatible with .lrf? OTOH, since those books are, by and large, available through a library, I'd have to be using a ton of PDFs I can't get anywhere else to make an upgrade worth the extra $200 (after the $100 rebate for turning in the 500)--and presuming I don't get extra coverage.
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