The battle rages on. Here are a couple of links I came across.
The first provides an interesting defense of Barton, and gives a little background on some of his critics. The writer is a bit of a firebrand himself, having a ministry opposing homosexuality which has gotten him considerable negative publicity. That said, his remarks regarding David Barton make sense:
In Defense of David Barton
The second is an interview of David Barton by Glenn Beck. I'm not a Beck fan, but in this interview he at least allows Barton to express himself and explain his positions. I think you will find them pretty convincing:
David Barton responds to critics during interview with Glenn on GBTV