Led Zeppelin song that I know how to play the intro riff of on the guitar and I just don't know the name.
It starts with an arpeggiated Am chord.  The whole intro riff is acoustic and arpeggiated.  I believe that it eventually goes to a hard rock riff and I believe there is a string of vocal "Baby's" in there too.
I can play the first two "phrases" of the song and I want to learn more of it and I can't think of the name of it.
Also, can anyone suggest good fingerpick-arpeggiated songs to learn?  This seems to have become my favorite style of playing.  I can't think of any other good songs to learn.
Thanks.
					
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This must be 
Thursday.  I could never get the hang of Thursdays.