I'm new to thinking about ebooks and all this info has my head spinning.

From reading this thread (after getting a little confused with the firmware talk lol) I'm double-checking on differences.
What I am gathering is that the difference is that the JBL give you DRM support and uses replaceable batteries (AA). Am I correct or are there other differences that might effect my decision?
Okay what exactly does DRM support mean? I know it has something to do with purchased books (Barnes & Noble I think I read). Does that mean one can buy ebooks from B&N and download them on the JBL?
You guys sound soooo knowledgeable about all this and I'm lost after reading this forum for hours now. : )
I just want to figure out which route to take. Help!