Currently Damaka doesn't offer any inbound or outbound number options, in fact it is very much a walled garden. Unlike Teleo it does require authorization to add a buddy. It failed to offer more than a two line option, the interface is clumsy (compared to Skype) and it just looks like a development that is at least a year behind Skype. I understand from reputable sources that it may not be a SIP client at all.

There are other walled / controlled options that are already more interesting for companies. For example Pangean Tech. has been developing an interesting platform. I'd like to see the bar raised. Anyone not designing for best in class is simply kidding themselves today. Skype is gaining 150K downloads per day. You have to have something real.

Then I installed and briefly tested this VoIP software yesterday night. One thing I didn't realise before was that Damaka is a actually a walled garden and does not offer interop with other SIP-based VoIP providers. In this perspective, I am a lot less enthusiastic about it and I rejoin tomtom's opinion that this one is unlikely to catch up as end-users don't care what underlying technology is used. With Damaka they get less features than with Skype and about 50 million less people to connect with.
Damaka: Skype's the limit