Posted: Thu Jul 12, 2007 11:34 am
Sounds like me and "The Rain Song" by Zeppelin...I just learned about the alternate tuning for it!! It can be done in standard, but it Ain't Easy. 
>>After all, John conceived and played the I Feel Fine >lick (on an acoustic no less)<<
Not to diminish John's brilliance, but credit should be given to the guy who originally wrote the riff later used on I Feel Fine: Bobby Parker, who was featured on the PBS show "John Lennon's Jukebox" (fascinating program, BTW). You can hear Parker talk about the riff and hear him play it on the program.
From Wikipedia:
Lennon's "I Feel Fine" riff would seem to bear a striking resemblance to one found in "Watch Your Step", a 1961 release written and performed by Bobby Parker and covered by The Beatles in concerts during 1961 and 1962 (with the two songs also sharing a remarkably similar Latin-style drum pattern.