AND IT IS FREAKING AWESOME.
Come on, it begins with "Hooked On A Feeling" and ends with "Ain't No Mountain High Enough." Peter Quill wasn't kidding around when he called the collection "Awesome Mix, Vol. 1."
I'm using Spotify. You can find it via other services too.
As for the Guardians movie, I've been looking forward to this for months. It opens tonight, so I will be pretty much useless until then.