Books.app is a simple eBook reader for the iPhone. It reads HTML and text files stored in your Media/EBooks folder, and is smart enough to enter subdirectories, if, for instance, you've broken a book down by chapters.
Changes:
New as of version 1.1
PalmDOC and Plucker support, thanks to Zachary Bedell (all the best hackers are named Zachary). Support is somewhat rudimentary at the moment. I hope to implement auto-splitting for these files in particular--at the moment large PDB books are impractical.
Added GIF support to the image-viewing functionality.
Bug fixes.
Rumor has it a new iPhone Software Update will arrive this week. Please don't forget that Books.app is at Apple's mercy, and it's very possible that after this update, Books.app (and all other third-party programs) will no longer work. (After all, no one's jailbreaked the iPod Touch yet.) So if you're thinking of donating, thank you!--but it's better to wait 'til after the update comes down the pike, in case you're never able to run the program again.