I bought a harmonica the day before yesterday, and I´ve been up almost all day and night to practice. I´ve learned to play quite a few songs allready, including Lookin out my backdoor, Lodi, Hey tonight, the intro to Down on the corner and Poorboy shuffle, just to mention the songs by CCR
I found a really good website where they have lots and lots of harp tabs, and some CCR songs to -
http://www.harptabs.com (not to be confused with harptab.com)
All the songs I´ve listed, besides Poorboy shuffle, have available tablatures to look at. There are many other good artists at the site to, like Led Zeppelin, tons of harptabs for Stones and Beatles, and almost any group you can imagine.