If I have a .8xp file with Axe source, how can I compile it to an application off-calc?  Can I pull apps off of WabbitEmu, perhaps?

You can't. This is because of the massive differences between program files and apps. For one, program files can use SMC, whereas apps cannot.  I believe, therefore, that there are different routines used to access data.  Either that, or at least the program has to be written with app compiling in mind.

I don't think it's possible, but don't know for sure.

Hm... no, WabbitEmu can't export applications. I'm not sure what you should do...
Maybe you could write an Axe program (or assembly) that will copy an app into an appvar then write a computer program to convert the appvar back to an app?

ask dj to do it for you.
as he is a judge, i don't thin it would dq you

Finally, Buckeye gets around to adding it (We're very appreciative)
Good luck with whatever this is for (contest, I suppose?)
Edit: 1000^th post!

Maybe.  I'll look into it.

I could compile the app maybe. One thing I wonder, though: what'S the best way to sign apps? I haven't done that in ages. However, as Builderboy said, when sending your contest entry you can just send the source and instructions on how to compile (including the Axe version used). We compile the stuff ourselves actually.