We are looking to move to IP telephony. I need to get up to speed on all that is involved to do this. I am looking to get some training and attend a conference. I was wondering what the best conference is out there that deals mostly with IP telephony. Does any one have any recommendations? Right now I am looking at VoiceCon 2007 or Internet & Telephony. Does any one have any experience with either one of these conference? Are they any good?