If you aren't clever, you aren't going to share data.
> The key advantage of fat binaries is ease
> of handling and that you can be reasonably sure that foo.i386 is the
> same version as foo.sparc.
Well, gee, that sounds like foo --version is just for you.
How about an extension to rpm so that it can hold several
architectures in the same package and extract the right one?
r~