I am currently learning about ereaders and am bouncing back and forth between the Nook and the Kindle.
One thing that I discovered in my research that may be important to shore_pk who likes to read the Bible is that I would consider the Kindle3 to be superior in one important way: ease of term search and highlighting.
I discovered this while viewing a video review which is lengthy, but informative. Some of the test criteria was bogus (TTS feature of the Kindle) but again, the part I think would be important to the Bible reader is the ability to mark and search for text.
http://www.youtube.com/watch?v=pxkCELCrQ_A The relevant portion starts at about the 7:00 mark.