Yep… funny moment when George Clooney (Yes that George Clooney) Is sitting on a swivel chair holding a Pepsi can so that the logo is showing. His chair is dramatically turned as someone tries to tell himsomething. As this is done he makes sure the logo is still turned towards the camera.
As for early Product Placement I remember the Cheerios scene in “Superman: the Movie”. Even as an 8 year old kid I though it was pretty damned blatant.
I just watched Psycho the other night on TCM (the Hitchcock version, not the crappy 1990s remake). Excellent film, by the way, for various reasons. I did some reading about it afterwards, and apparently a couple of things in the movie almost didn’t get past the censors - and not just the violent parts. For example, the scene where Marion flushes some scraps of paper down a toilet - well, apparently, you weren’t allowed to show a toilet in ANY context at the time, and this may have been the venerable commode’s first movie role. Also, the first scene in the movie, with Sam and Marion having finished their lunch-hour “rendezvous” was almost cut due to the fact that unmarried couples could not be shown together in the same bed. I’m not positive if either of these were absolute movie “firsts”, but they were at least controversial at the time (1960), and almost didn’t make the theatrical cut.
Bonus trivia question: what did they use for false blood during the shower scene?
Chocolate sauce?
Correct! 
Hell, some married couples apparently didn’t sleep in the same bed. Remember I Love Lucy? She & Ricky had two twin beds with a nightstand in between (probably to reinforce that they didn’t shove the beds together!).
Thought of another one this morning- the first time I saw “hot girl-on-girl action” in a non-porn film? The Hunger, an excellent vampire movie which features a hard-core lesbian sex scene between Catherine Deneuve and Susan Sarandon. The lead-up was pretty blatant, and I kept thinking, “No, they aren’t gonna… they couldn’t show that… HOLY CRAP!”
No idea if this is accurate or not, but today’s San Francisco Chronicle carried a review of the new movie Irina Palm, starring Marianne Faithfull, which claims that she was the first person to utter the word “fuck” in a mainstream film, in I’ll Never Forget What’s’isname (1967).
I have a twenty year old Book of Lists that makes the same claim, so its probably true.
Its claimed that the 1975 movie Capone contains the first and one of only a few ever spread leg shots in a mainstream film (Susan Blakely), but the film is unavailable on DVD and supposedly most theatres didn’t show that scene anyway- hopefully a fully restored DVD is in the works. Not sure what you could see with 1970’s fur anyway, which almost (almost) ruined a similar scene in Bad Timing starring the heavenly Teresa Russell.