This instructable teaches you how to automatically download songs from Last.fm and Pandora for free! It uses a free and opensource project called iRadio Capture 2.0 to do so. Interested? Let's get started!
Part of the API that is used for iRadio Capture is still listed as "under development" by Google. Thus, for it to work, you must download the dev version. Even if you already have Chrome installed, you must download this version. You can get it here
Now when you visit Last.fm or Pandora.com there will be a little icon that appears in the address bar that looks like the attached image. Click it and it should turn brown, indicating it is on. Now just start up iRadio Capture 2.0 and enjoy!