Everyone knows and loves the Billboard Charts.  The charts define what is considered 'hip' and 'fresh'.

If you haven't noticed, A lot of sites that I have created are centered around YouTube.  I love the source and so do a ton of people.  As much as I enjoy surfing on YouTube and watching videos, I think its extra special and exciting to be able to have context around the videos you're watching.  It is primarily for this reason that I have open sourced two projects (one that allows users to search YouTube via a simplified jQuery plugin [jQTubeUtil], the other that allows controlling the YouTube embeddable player [TubePlayer]) and have utilized them in various different capacities. 

In my quest for different ways of enjoying YouTube, I have come up with 

• A loop creator of YouTube Videos based on a 'Smart Search' - YouTube QuickPlay
• A site that allows one to browse through YouTube videos posted by all relationships (friends, pages, musicians etc) and create and share playlists - TubeLoop
• A flipbook of artists you like on Facebook and their videos (w/ published dates and meta data around how hot the artist is and how familiar they are) - LikeBook.fm

And have created yet another one.  This time utilizing the Billboard Charts.  The Billboard Charts + YouTube Videos = YouTube surfing the Billboard charts.  It's really fun, and free.  The only snag with this is that the Billboard API isn't really maintained properly (pretty stagnant as far as updates go), and as a result the feeds are a month behind and some feeds don't work properly. 

Anyhow.. go check it out - BillboardTube.fm