Questions about builds

I have a couple of questions about the various Icecast builds that exist:

1) It seems like new builds being done today are all "kh" builds. Is that observation correct? If I see something non-kh, is it older by definition?

2) Other than possibly age, what is the conceptual different (if any) between kh and non-kh builds? What do kh builds hope to accomplish that old Icecast never did?

3) There was a kh-ads build at some point. Did that later become the Ando Targeted Ad Injector? Did the ads build continue to be developed?

Thanks for humoring my many questions. :)


Wes Keene