There is an article in The Register which quotes Rohan Mahy challenging Skype. Rohan echoes some of the points I made in "Skype is no different". But I do not share his concerns regarding security. He feels rogue programs can infect a computer through Skype API. This is premature because the full scope of the API is yet to be released. A SIP client (like Windows messenger) can also provide API with the corresponding security holes.
I strongly feel that Skype is fundamentally equivalent to SIP based implementations. This means, if SIP is free of security issues then Skype also can be made free of security issues.
Once more Jeff Pulver has lamented about lack of new services/features in VoBB and too many “me too” service providers. Also Comcast Cable President Steve Burke said. "I have yet to see a true killer app for broadband," Meanwhile, a report in Light Reading called “VoIP vs. PSTN” says: “On the revenue side, VOIP should allow the deployment of new services that were not possible (or economical) on the legacy infrastructure. And this really is a key message about VOIP: There is no point in migrating if carriers are just going to run the same old services on a new infrastructure.” So the search goes on…