He talked about meeting Ralph McQuarrie, talked about Syd Mead, about how he got into the business designing the "head of a robot" that turned out to be a Cylon when the original BSG was starting.
He talked about the cargo containers and designing the cargo bay of the TMP Enterprise and why and how it connects to the shuttlebay when originally it didn't.
He talked about designing the 1701-D bridge and how the makers of the show wanted a conference table at the back of the bridge, and how he thought that would be silly and his reasons why he thought that, and how it was then incorporated into the NX.
He talked about the 1701-D ready room and particulars like the bathroom and bed/couch and why it was there.
He talked about why the viewscreen in 1701-D bridge was designed by him to be so giant on Gene Roddenberry's orders and how the size of the bluescreen necessitated it to be reduced in size to make it work onscreen, and how he told the DP how to shoot it to make it seem like a hologram.
He talked about his ongoing 1701-C project.
He mentioned being on a star trek forum recently discussing something technical (I can't remember what exactly now), and I recall seeing him post something on trekbbs recently, so he could very well have meant this site.
He also tells a story about the first Back to the Future and how Marty was originally supposed to get power to get up to 88 MPH (not the lightening bolt).
