Glad to hear you're coming for an interview.
There are a few SDNers who are part of the class of 2007.
Here's a link to an OSU-COM class of 2007
thread (which contains a link to an earlier thread as well).
There are also several of us in the class of 2006 who'd be happy to answer questions (and meet you when you're here!).
As to your question, the OSU interviews are pretty laid back. They usually have 8 people interviewing on the same day, taking turns with the interviewers during the morning. You will be interviewed by 2 people at the same time (a DO & a PhD). There will be a couple of informational sessions & lunch with a couple of
current students.
As far as out-of-staters, 15 people out of the 88 in my class are from out-of-state. I believe that is the # of out-of-state spots. 3 of these 15 are on SDN (Fenrezz, patrickhenson, & scrappydoo). I'm sure they'd both be willing to answer any questions you'd have about being an out-of-stater.
Feel free to PM me with any questions.