I know of that internship.. It is a great opportunity. In the past, they have offered people the opportunity to stay there and fly for them. You DO get a check-ride and ARE typed in the aircraft. Plus, you get to sit right seat in the Citation (good experience, can't log the time though). Interviewers will love that you have lots of time in a King Air. I'd say go for the internship. Minimums for regionals are falling and you will have a good shot with your hours.