Echoes - Pink Floyd (23:28)

Sheep - Pink Floyd (10:23)

The Necromancer - Rush (not sure about the time on this one)

Le Matin Des Noire - Barry Adamson (10:36)

Spanish Key - Miles Davis (17:26)

Saltwater - Chicane (10:03)

Back to the Rivers of Belief - Enigma (10:32)

Three Days - Jane's Addiction (10:45)

Hits of Sunshine - Sonic Youth (11:05) ...someone's gonna mention The Diamond Sea you just wait...

Juanita/Kiteless/To Dream of Love - Underworld (16:36)     

"Every day holds a new beginning and every hour holds the promise of an Invitation to Love." 

The Dandy Warhols It's A Fast Driving Rave-Up With The Dandy Warhols 16:04

Droning, throbbing, jingle-jangle masterpiece, IMO.

Led Zeppelin (is that cheating?) In My Time Of Dying 11:06 from one of my favourite albums... Physical Graffiti

x-ray
if your back's against the wall, turn around and write on it...

Shine on you Crazy Diamond - Pink Floyd (25min 54 sec)

Greatest song ever written. 

Desolation Row (11:21)- Bob Dylan

Logic Hat Online- logichat.org

The Byrds: Eight Miles High (Live) 16:03

The Stones: Can't You Hear Me Knockin'? (Live Licks) 10:02 (WHEW! Just made the mark!!)

David Sylvian & Robert Fripp - Darshan (the Road to Graceland) - 17.17

The Fall - Garden - 10.02
("Shotgun!  Shotgun!  Master Hemingway!  Shotgun!")

Iron Butterfly - In a Gadda Da Vidda

Pink Floyd - Shine on you crazy diamond

Pink Floyd - Sheep

Rush - Hemispheres

Rush - 2112

Blood Rock - D.O.A.

I was wondering when Iron Butterfly would show up.

Kansas - Magnum Opus 11:18

LED ZEP - Achilles Last Stand 10:22

LED ZEP - In my Time of Dying 11:04

Queensryche - Suite Sister Mary 10:41

AC/DC - Let there be Rock (live) 12:17

Winner of the close but no cigar award: Metallica - Outlaw Torn (live) 9:58; the studio version is 9:52 

"Every day holds a new beginning and every hour holds the promise of an Invitation to Love." 

I used to admire all the long Pink Floyd ones, Shine On, Dogs and Sheep, Echoes. But somehow I am finding more beauty in their more modest songs now. Not that I have anything against Echoes, it remains a masterpiece.

No one mentioned Dire Straits's Telegraph Road (slightly over 14 minutes). That's sheer beauty! Not surprisingly, the least interesting here are the sung parts, I like Mark's murmuring but he is far from the greatest singer ever ;-)
However, the instrumental bits are wonderful! Especially the piano theme which later is taken over by guitar, I am not able to tell you the exact time of it but I'm sure you know which one I mean? After that the vocal parts come back once again.

both songs are alright but I have an impression Led Zeps were better off with the songs which lasted just below ten minutes: Since, Dazed and Confused, Stairway...

The longest ones tend to be boring at times.

Bobi 1 Kenobi

B. Beware
O. Of
B. BOB 

let me digress for a moment to expand upon BOB1's Pink Floyd statement to mention some of their "modest" songs and list some of these I particularly like.

1. "San Tropez" - remains one of my all time favorite Floyd tracks

2. just about anything off of Obscurred By Clouds, which doesn't get enough much notice because it came in between Meddle and Dark Side..."Burning Bridges", "The Gold It's in the..." - a great track featuring Gilmour jamming at his best, "Wot's...uh the deal", found a recent live performance of this by Gilmour and Wright, "Childhood's End" and "Stay are both great...

3. "On The Turning Away" - this is a wonderful piece of work

4. "If", "Summer of '69" and "Fat Old Sun" from Atom Heart Mother  

"Every day holds a new beginning and every hour holds the promise of an Invitation to Love." 

Mouse on Mars - One Day, Not Today 11:20

It's actually one song split into 12 tracks, for no apparent reason, some as short as 5 seconds, which is interesting in shuffle mode. 

Aren't most Dream Theater songs close to 10 minutes?

Dont get me wrong, Great Band but some long tunes.

"Ive got good news....that gum you like is going to come back in style!"

"I'm a WHOLE DAMN TOWN!"