So me and some others have been working on this for a while and it's going OK. We are at the point now where we could do with some additional testing and critical feedback.
If you frequent The Hub then you may have seen the thread there but to increase accessibility a subreddit has been created:
The source code is on Github so you can run the client, there is an online demo so you can see what the client looks like. All linked in the side-bar.
Its development software so be careful which machines you run it on.