Heh, technically, keyclone isn't approved by Blizzard.

The way keyclone functions is accepted within the guidelines Blizzard presented for its game. And as long as you don't abuse it, it is accepted. Same for any other programs.

As long as you don't bot, or do anything else illegal with such programs, it's fine. Most of these programs can allow for botting, but you just need common sense to know that's a surefire way to get a ban. :P Keyclone just happens to be made quite specifically to dual-box games, WoW in particular.