For those interested, the Smile boxset is still available through Amazon. Brian Wilson and Van Dyke Parks started working on this musical imagination on the subject of Manifest Destiny (look it up ;-) in 1966, and closed it down in mid-'67. It is the great "lost work" in Rock 'n' Roll history, Brian's follow-up to the Pet Sounds album.
The boxset contains every second of the recordings Brian and Van Dyke were able to get on tape before Brian collapsed. You can read the details on Smile in two chapters in the great book Outlaw Blues by Paul Williams, which were originally published in Crawdaddy magazine as the Smile recordings were being made.
Smile may just change your life, musically. It would have been a masterpiece had it been completed; even unfinished it is astonishing. It is not legendary for no good reason.