I applied through a recruiter. The process took 1 day. I interviewed at 3M (Saint Paul, MN) in Oct 2010
Interview
I went to an engineering conference in OH. I presented my resume to a recruiter and was basically offered an internship on the spot. I found this highly unusual so I went ahead and waiting for a phone interview. Surprisingly I got a call back 4 days later to inform me that I would be receiving paperwork to formally accept the offer. In other words, there was no interview