A Better VOIP Client

I dislike phones. Not so much the phones themselves, but their interface. The basic interface, a bunch of numbers and some special keys, is bad enough, but when this interface is extended it's always a mess. I don't think I've ever seen two phones with the same mechanism for programming the speed dial buttons and the conferencing features are always hopelessly arcane. Even something as simple as putting someone on/off hold can be ridiculously complicated. This is one of the reasons I prefer VOI