Well, Lyford has made lots of videos. It takes time to watch them so I haven't done that much (yet). This is his "response" to the latest article:
He basically just boasts how he will continue working on Banx and doesn't address any real issues that DeMartino has raised.
I just wrote a post about Banx and C-CEX. Now I'm reading old bitcointalk threads to see if I can find more interesting stuff. Unfortunately Lyford has deleted and edited the official thread so much that it's hard to know what really happened. But here is another one that I'm going through currently.