For the US store you can find 
an iMix of single/exclusive tracks not included in the box set.  Out of curiousity I thought I'd try digging a little deeper amd head into compilation territory, and while this is no means exhaustive, there are some tracks on there I thought I'd find that weren't (Heroine, etc). For more on tracks below browse the discography:
Acadie (Daniel Lanois): Still Water; Jolie Louise - 
USAAcross the Universe: Across the Universe - 
USAA Perfect Stranger - The Island Anthology: Conversation on a Barstool (Marianne Faithfull) - 
USAAural & Hearty Album: Air Suspension - 
USAIn America (Soundtrack) Time Enough for Tears - 
USAMillennium Thoughts Compilation: Speaking in Rome, Sept. 1999 - 
USAMoulin Rouge (Soundtrack): Children of the Revolution - 
USANancy Sinatra: Two Shots of Happy, One Shot of Sad - 
USAOverdose d'amore (Zucchero) Album - Blue 
USAPavarotti & Friends: Together for the Children of Bosnia Compilation: Miss Sarajevo; One; Turandot: Nessun Dorma!- 
USARobbie Robertson Album: Sweet Fire of Love; Testimony - 
USA   Sharon Shannon:   The Marguerita Suite - 
USAThe Songs of Jimmie Rodgers Album: Dreaming With Tears in My Eyes - 
USATina Turner: Goldeneye - 
USA 1, 
USA 2Flyer (Nanci Griffith) Album: These Days in an Open Book, Don't Forget About Me, On Grafton Street, This Heart - 
USAThe Millennium Collection: The Best of The Call: What's Happened to You - 
USA[Edited on 2005-4-27 by Carl]