The Importance of writes "JibJab, creators of the hilarious parody of Woody Guthrie's 'This Land is Your Land' featuring Pres. Bush and Sen. Kerry, were first threatened with a lawsuit and then, with the help of EFF, went to court first in a pre-emptive strike. Well, EFF discovered that the song has actually been in the public domain since 1973 because it was first published in a songbook [PDF] in 1945 and the copyright was never renewed. The case has now been settled. Here are some addtional links."