I am the developer of Address Book Server which I market at www.addressbookserver.com. Address Book Server provides the ability to synchronise your contacts and events with your own server in a similar way to services offered by the jobsian cult. I however offered the service several years before it occurred to them, but this did not stop them from using the same name for their own offering in 10.6 Server.
The simple fact of the matter is that when it suits them they just walk all over anybody they can. Either they just take what they like (see Rendezvous now called Bonjour) or they send their army of lawyers after you. Either way if you don't have the resources of a large corporation you loose.
Either way, that is just they way our industry is these days.