I was looking for a decent document reader (coz working with documents all the time and need them to be always with me)
and tried Readdledocs (liked it more than stanza or ereader)! It gives opportunity to read all file formats, even large PDF files, has a lot of features (like bookmarks, e-mail function, landscape mode and so on). Also liked the way of downloading files to their online server (so you create back up) and you can watch them whenever you want!
Overall it's great app and I highly recommend it.