Yes, there are still a few titles not yet available.
"Quicksilver" by Neal Stephenson wasn't yet available for download as of this morning, oddly enough though the other 2 books (books 2 + 3 in the series) "The Confusion" and "The System of the World" were available to re-download as ePub files.
It sure has been nice to be able to move my purchased Sony eBook store books over to the Nook. Didn't expect to be able to do that, thought I was out of luck and doomed to be stuck on one platform forever. Standards based file formats may be just the thing to increase eBook uptake.