I interviewed in early June and was offered a class in the Saab 340.
As far as tips for the interview, get a good nights sleep, something that I didn't get to do because I didn't get to the hotel till close to midnight. The original plan was to arrive around 4pm, but I didn't realize that Mesaba will non-rev you to you're interview. If you are not familiar with this, essentially it means that you will fly standby and will probably not get there when you expect to. Therefore, when they give you you're flight time, try to get there plenty early in case they don't have room on the first few flights.
As far as the interview, study all the normal stuff, Jepp plates, ATP written etc. If you can get some sim time first, great. If you haven't already, check out willflyforfood.cc The interview description there was pretty much dead on.