My list from shortest to longest:
Legend Of A Mind - The Moody Blues (6:32)
Bartender - Dave Matthews Band (8:32)
Jesus Of Suburbia - Green Day (9:08)
Rain Dance - Herbie Hancock (9:16)
One Million Billionth Of A Millisecond On A Sunday Morning - The Flaming Lips (9:21)
Porcelina Of The Vast Ocean - Smashing Pumpkins (9:21)
Yes, Anastasia - Tori Amos (9:33)
Xanadu - Rush (11:05)
Make - Do Make Say Think (12:10)
Moonchild - King Crimson (12:13)
You Lust - The Flaming Lips (13:05)
Larks' Tongues In Aspic, Part One - King Crimson (13:36)
A Tab In The Ocean - Nektar (15:30)
In Held (Twas) In I - Transatlantic (17:21)
Thick As A Brick, Part One - Jethro Tull (22:40)