Originally Posted by thadiyan
Most likely once a jailbreak is released and done, you should be able to drop books into your ipad and use the Kindle App to read it. Your best bet at this point is to convert it to epub and use iBook to read it.
Or Amazon can issue an update to their app to support file sharing with the desktop. There are already a few apps (the iWork apps, and one or two of the comic readers) that support this. There shouldn't be a need to jailbreak the device just to copy files, but the app has to do a little bit of work to support it.
I wouldn't be all that surprised if this feature makes it to the iPhone as well.