On May 16, 2013, openrcs.com opens its service in beta version!
The primary goal is to offer a free SIP service for Kamailio project community and world wide users. The integration between the web portal and the SIP server still has a long way to go, but the SIP service is ready to go for voice and video calls as well as for instant messaging. XCAP server and MSRP relay are enabled, too. Those willing to play with SIP over Websockets and WebRTC can use the SIP server from openrcs.com.
For support, users of the service can post questions on the internal forum hosted by public group openrcs.
Do note that the service is in beta stage, meaning there are many things still to tune. Also this is a free service provided on a best effort basis.
Go to Welcome page and create yourself an account (it is recommended to use https for security and privacy reasons). The SIP username is the same as web login, but the SIP password is different, generated from your profile page, in the menu: SIP Admin => Account.
We hope this service is going to be useful for many people out there!