I downloaded the Stanza app yesterday and am having some problems figuring it out. I read several places online that Stanza can be used with Dropbox to import ebooks. In Stanza I don't see anything that can be pointed to Dropbox. In Dropbox I loaded a pdf file and the Open With menu does not include Stanza. I was able to transfer that same pdf file to my iPad via USB iTunes. What am I missing here? Also, I wasn't able to find a list of all of the file extensions that Stanza can open. I tried azw & mobi (both Kindle) files and it wasn't able to open them. So...what files can Stanza use?