This sweet new Chrome extension creates a temporary history of the songs you've been listening to and provides an easy download link to nab your favorite tracks. It even sets the right name on the file and adds id3 tags. I'm using it right now and I have to say, it is very convenient.
My biggest gripe with Hypem used to be that I would like a song there, come back a few days later to hear it again and it'd be taken down. That always sucked. Now I can just download it for my future listening pleasure, in case Hypem has to take it down.
Scott Rogers, the creator of the plugin, also plans to add desktop alerts for what track is playing and support hot keys. Sounds pretty sweet.