Wow! Terrific update. I have barely touched my iRex DR1000S since I got my Kindle 2i and now the Kindle has PDF support its pretty much the ideal reader for me. ePub support would be nice but calibre does such a good conversion that it would really just be a convenience.
Btw... easiest update ever! I read this thread at work and was wondering what to do with the .bin files that Nate linked to. But as soon as I get home and turn on my Kindle I find it had done the update by itself in my absence.