Excited to try the iOS implementation. Is a desktop client (OSX, Linux, etc) for RedPhone feasible? I understand (I think) that RedPhone doesn't use usernames, but instead uses your phone number as the identifier - but I'm curious if that's a structural restriction at this point. Every time the issue of secure communications comes up the issue of what program to use comes up as well. There aren't a lot of good options at this point. Jitsi seems to be the best people can suggest.