Interesting comments, especially about the capability to replicate the simplicity of Skype, but one point is to speak about it the other is to deliver. I have installed one SPA-2000, 2 x SPA3000 and about 10 softphones, and I can say that it is significantly more complex than using Skype.

Skype also leave SIP implementations for dead when it come to connect to the servers behind changing network architectures which is what happens when one commutes (and this is one of the key points put forward for VOIP).

I believe SIP has some good things, and I use it extensively, but the applications need a major effort to improve their ease of use and functionality. We should applaud what Skype is doing, duplicating the good part and try to interconnect.

For what it's worth.

John