Bob...see Boobs, Dennings.
The Collector scene was a tie in to Guardians of the Galaxy and the eventual Thanos/Infinity Gauntlet movie. It's really a long setup for Marvel. The director complained that it was oddly placed(and it was). It is one of those 'needs explanation' things, but Marvel isn't afraid to shoehorn in a geekster egg. I actually thought the post credits scene was kinda cute(hope you stuck around for that).
Yeah i caught both scenes. I knew the Collector scene was for Guardians and what not, I'm just not familiar with the character at all. Then again I'm not familiar with the Guardians either. I will says this though, I am enjoying all of the continuity and I look forward to the payoff.