[Jtsummers]

Office Communicator/Microsoft Lync. I can't speak to Lync (the current iteration), but Communicator, while functional, leaves a lot to be desired. I use a Mac at home. Spell-check everywhere is awesome, MS can't figure out how to unify their UIs so that useful little features are accessible everywhere. In theory it's nice because it plays well with Exchange. However, different organizations in a large corporation with their own Exchange servers may or may not be able to communicate with each other over it. And it seemed to go back and forth daily. And a ton of small UI misfeatures that make it unpleasant to work with as a communications medium (IMO, again, beter than nothing, but worse than many other options).