Isn't mural.ly a whiteboard where you can collect stuff and yes collaborate? Framebench is probably more for online reviews and feedback. Did you notice the voice call feature?
Yes the starting idea is not the same, but in the end it looks you could use mural.ly to a very similar effect, that's why I was asking :)
Anyway, good job and good luck!
Thats true, in fact I love their sense of UI design. Thanks a lot for pointing it out.