Well, after a ridiculous amount of work, it's finally starting to come together: Here is the first beta version of Xee 3.0:

https://xee.googlecode.com/files/Xee3.0beta1.zip

This is an near-complete rewrite. Most of the code is completely new. Most of the functionality should be implemented at this point, so I finally feel like calling it a beta and giving it a public test. What this really needs now is a bunch of testing. Please try it out, and tell me if something is broken, or missing. Or just tell me it works fine, that's useful information too.

The bad news is that this took so much effort to put together that it'll probably cost money when it is done. This beta version will also expire in a couple months. I haven't decided yet how exactly I will distribute it, and if I'll release any source for it (I was considering the option of doing that even if it is distributed for pay on the App Store. We'll see.)