I certainly don't have the web space and bandwidth resources for a
repository and frankly I joined Mageia as a packager precisely because I
thought Mageia would finally make confusing and conflicting third party
repos (like Mandriva has) obsolete.
We can host repositories for you, if Mageia is unwilling to accept them - you could make a kde3 rpm that adds the necessary sources to use. Or, Mageia could make an official kde3 repository that is disabled by default but can be enabled on installer/rpmdrake. I'm not the expert at this, though :-/ that's mageia dev decisions.