Originally Posted by Daithi
My comment was a one line comment and apparently not very clear. The original poster basically asked if Amazon could provide a PDF viewer for the Kindle 2 with a software update or if there was a hardware requirement for the PDF functionality. Here's a more indepth answer that I hope will clear up any confusion.
The PDF viewer functionality is provided by software so technically it is possible for Amazon to provide a PDF viewer for the Kindle 2 (and Kindle 1 as well). However, the Kindle 2 only has a 6" screen, which is just slightly larger than a 3″ x 5″ index card, and from a practicle matter this sized screen is just too small for displaying many PDFs. (snip)
Ah, yes, the practicle--the smallest possible unit of practicality: inherently indivisible. ;-)
But seriously, you could view the pdf page in landscape mode, half an A4 page at a time on the K2 screen. If you also cropped the margins, you'd be at something like 90% full size--like the KDX screen in portrait mode. This would be somewhat suboptimal, I grant you, but not completely terrible.