Another hurdle for VOIP adotion - vishing
CIO magazine this week talks about how people are using VOIP to execute a 'vishing' attack. Leveraging voip, it's easy for people to get a number, use it for a short amount of time and then drop it. Skype and Vonage, among others, provide a fast way to get a voip number. Looks like another item that your chief security officer will have to look after.