Just watched it tonight, by far one of the greatest episodes of That Metal Show I have ever seen (gee, I wonder why?)
Anyways, yeah, they basically just asked him questions about Iron Maiden, the fans, etc. He was a good sport and very comical at times (he got several laughs out of the audience).
The big points that were covered were his solo album, and he said that he WOULD be interested in touring as Steve Harris (as long as it didn't get in the way of Iron Maiden touring, he said, so don't worry). He also said this solo work has been in development for decades, and that the only reason it was finally released now is because it was finally finished after so long. The other band members of his solo group he has known since before Iron Maiden, he said. The hosts also asked a few personal questions, though I don't remember what they all were (not too much significant, just basics).
In regards to actual Iron Maiden news, he basically said that they don't like to write or talk new material while touring, so nothing is currently in the works besides the 2013 part of the Maiden England tour. He did say though that there would DEFINITELY be another Iron Maiden album done after this tour (this got a huge cheer out of the crowd).