I recently ran across this 20-minute tutorial by Parker Walbeck.
I think it contains a lot of good information so I thought I'd pass it along. Parker shoots many other types of video in addition to real estate video.
I like Parker's style except for the fact that he doesn't pay much attention to keeping walls straight up and down. I guess the vertical wall thing is just a still photographers obsession. Videographers that don't shoot stills aren't bothered by walls that aren't vertical. We've talked about this issue recently. There are a variety of opinions on this.