You people are too late on this topic, people have already started using it in their offices all i could say here is many of them may be good, though one of the best i searched on google
is R HUB http://rhubcom.com one of my friend is also using it i found it great it delivers advanced Web conferencing software for PC and Mac in a secured appliance. Universal attendance technology with NO DOWNLOAD of any kind ensures everyone can join meetings in seconds. All you need for collaboration, seminars, training, remote support and marketing is in this box. On the whole it is great appliance form which you won’t be disappointed so go on and give a try.