Here are my top ten artists and how my top three tracks compare to the last.fm rankings.
Thanks to nightfloat for the idea!

I. Wilco
1. Either Way (last.fm rank #3)
2. Kamera (last.fm rank #7)
3. Side With the Seeds (last.fm rank #15)

II. Sufjan Stevens
1. Casimir Pulaski Day (last.fm rank #2)
2. Chicago (last.fm rank #1)
3. John Wayne Gacy, Jr. (last.fm rank #5)

III. Dashboard Confessional
1. Reason To Believe (last.fm rank #18)
2. Don't Wait (last.fm rank #5)
3. Saints and Sailors (last.fm rank #54)

IV. Death Cab for Cutie
1. I Will Follow You Into the Dark (last.fm rank #2)
2. A Movie Script Ending (last.fm rank #23)
3. Title and Registration (last.fm rank #7)

V. Rufus Wainwright
1. Poses (last.fm rank #5)
2. Going to a Town (last.fm rank #3)
3.Do I Disappoint You (last.fm rank #8)

VI. The Decemberists
1. The Crane Wife 3 (last.fm rank #1)
2. The Crane Wife 1 & 2 (last.fm rank #32)
3. Clementine (last.fm rank #23)

VII. The Shins
1. Phantom Limb (last.fm rank #4)
2. Sleeping Lessons (last.fm rank #5)
3. Red Rabbits (last.fm rank #11)

VIII. Laura Veirs
1. Don't Lose Yourself (last.fm rank #2)
2. Cast A Hook (last,fm rank #25)
3. Black Butterfly (last.fm rank #21)

IX. Beirut
1. Postcards From Italy (last.fm rank #1)
2. The Canals of Our City (last.fm rank #7)
3. Mount Wroclai (Idle Days) (last.fm rank #3)

X. Maritime
1. Calm (last.fm rank #2)
2. Twins (last.fm rank #6)
3. No One Will Remember You Tonight (last.fm rank #13)