It’s not that designers and developers don’t or can’t get along. What the team at Redline realized is that they speak a different language. So to facilitate the communication between these two life forms they created this tool.
It’s simple to set up, simple to use, and simple to incorporate into your Pivotal Tracker account—what else could you ask for?
Redline.cc is in beta, so cut them some slack (not that there’s anything to gripe about) and ask the designers you work with to give them try.