Justin Roiland and Dan Harmon reflect on S2 and talk briefly about S3. I hope "Interdimensional Cable 3" happens. Those eps are so great for experimental, one-off bits. Rick and Morty: Dan Harmon and Justin Roiland Interview
Nothing tops Ants In My Eyes Johnson, but the "How Did I Get Here?" bit had me rolling. The Plumbus scene is great too.
Dailymotion might have a lot of episodes, @gonz (Alex). I think Adult Swim's website has a handful of S2 episodes streaming for free.
Last I saw S2 hits Hulu later this month. S1 is already up there. EDIT: Just checked, June 26th for S2 on Hulu!
Apparently the season 2 dvd/blu-ray comes with a plumbus instruction manual. That's actually pretty hilarious.
It's a funny concept and that's about it haha, reading through it is just gibberish. I suppose that's the joke though.