Skype decided to accept SIP as the defacto to take the corporate route. They had resisted SIP for a very long time, probably the only company that grew to its impressive user base without any standards acceptance. Although, I do admire their sense of creative an preseverance in getting to this point, they did leave a lot of opportunities on the table. Also, one has to bring in the Ebay effect into it, sheer lack of understanding by Ebay hurt them (probably??)
Nonetheless, it seems like the right move for Skype atleast for the corporate side.
The movement of VoIP of the last six months has reinvigorated by belief in VoIP again and has created the motivation of directing some time in thinking of creating new things in that direction. Need to take this segment seriously once again. Sounds like it is 2006 again ;-)