Songs are a tough one because we can't publish copyrighted tunes unfortunately.

This might not be exactly what you're looking for but on a lot of my lessons, I include a song for you to practice to. This includes a video of how it's played, an MP3 of what the guitar sounds like and a Jam file loop to practice to.
You could always use the Jam loop to practice leads and things to as well.

ie, I just finished doing a series of lessons on seventh chords that includes a song after each one.

http://guitartricks.com/lesson.php?input=9609&s_id=631