iLike has teamed up with Billboard, the music chart provider, to create new charts for tracks being played and shared through iLike's service and Facebook app. This is essentially a "branded" Billboard chart for iLike users, to be shared with Facebook users and others, and should leverage the popular iLike Facebook app presence very well. They will consist of multi-tiered charts and will reflect the activity of iLike users based on what they're listening to with their iLike desktop apps and Facebook applications.
There will be two ongoing, weekly Billboard charts that will display the week's top 25 "most added" songs for Facebook users' profiles and top 25 songs added to personal music libraries as well. The charts will be available on both Billboards website as well as the Billboard magazine.