Some quick early comments.

Have been online, sent page to epub, used the reader and annotation tools. Have noticed speed improvements everywhere; lcd and reader. When using colours with pencil tool, now, it is just as fast as with black. NICE.

So far, am liking the new UI. Now on to pdf's (because that's what I use the most) and the journal and calendar... and... and ...and.... Me thinks I'll be gone for a while.