TACK-O-RAMA is the place to go when you're looking for some great, free retro fonts! I stumbled upon this site while looking for a 50s font for a layout and was so delighted with the amount of free fonts, clip art and photos.
http://www.tackorama.net/ has retro fonts from the beginning of the last century, like Art Nouveau, with fonts for every decade until the 80s. And the black and white photos and the clip art are free to use on websites.
This is a place I will return to often.