Luis,
After buying and trying a couple of comic readers for the iPad, I came across a review for YACReader and picked it up. I must say you have done an outstanding job. The combo of YACReader iPad with the YACReaderLibrary for OS X works beautifully with my large library of comics.
The iPad I am using is shared by family, and YACReader is being used by my young daughter and myself. While it's not really an issue with my daughter, it could be helpful tool for parents to be able to assign a password to a folder, so books within that folder could only be accessed after entering the password. That would allow the parent to load books for multiple age groups, and not worry about someone reading something for the older kids or grownups.
Second, for copying/moving folders, being able to select multiple folders would be great (if this is already in the app, I don't see how it's done).
Last, unless I am mistaking, it seems you are disabling the iPad autolock feature if you are currently in a comic. Could this be configurable from within the app? As someone who has fallen asleep while reading more than once, this could have someone waking with a low or dead battery.
Thank you for your time, and thank you for a fantastic app. I'm a .NET developer by day, and it is always a pleasure to see a well designed, stable program. Nice work.
Bill Harting