They were very nice and asked a lot of questions about prototyping & code debugging. Very interesting opportunity: they do advance technology scouting for other groups in the company.
It was one of the nicest interviews I've had in a long time.
Jul 7 update: I did not get the job, the feed-back (HR were nice and gave me some) was:
[...] the leading candidate is internal, so by default, has somewhat of an edge (knows the product well, the company, etc.). Trust me when I tell you that you did extremely well on the interview. They are a tough group to impress and you did that.Bummer. No matter how well I perform it still does not stick.
-ulianov