I'm rather biased on a lot of this list, but...
2000 :~
Capercaillie ~ "Nadurra"
Delerium ~ "Poem"
2001 :~
Stevie Nicks ~ "Trouble in Shangri-La"
Blackmore's Night ~ "Fires at Midnight"
Old Blind Dogs ~ "Fit?"
Ruth Barrett and Cyntia Smith ~ "The Early Years"
Lúnasa ~"The Merry Sisters of Fate"
2002 :~
Karen Matheson ~ "Time to Fall"
Dòchas ~ "Dòchas"
Lesley Garrett ~ "The Singer"
2003 :~
Fleetwood Mac ~ "Say You Will"
Blackmore's Night ~ "Ghost of a Rose"
Capercaillie ~ "Choice Language"
Delerium ~ "Chimera"
Old Blind Dogs ~ "The Gab O' Mey"
Meat Loaf ~ "Couldn't Have Said It Better"
Lúnasa ~ "Redwood"
2004 :~
Lúnasa ~ "The Kinnitty Sessions"
Jethro Tull ~ "Nothing Is Easy: Live at the Isle of Wight 1970"
2005 :~
Goldfrapp ~ "Supernature"
Karen Matheson ~ "Downriver"
Julie Fowlis ~ "Mar a Tha Mo Chridhe"
Dòchas ~ "An Darna Umhail"
José González ~ "Veneer" (2003 in Sweden)
Mediaeval Baebes ~ "Mirabilis"
Shelagh McDonald ~ "Let No Man Steal Your Thyme"
Ian Anderson ~ "Plays the Orchestral Jethro Tull"
2006 :~
Blackmore's Night ~ "The Village Lanterne"
Delerium ~ "Nuages du Monde"
Meat Loaf ~ "Bat Out of Hell III : The Monster is Loose"
Lúnasa ~ "Sé" ("Six")
Sandi Thom ~ "Smile... It Confuses People"
Loreena McKennitt ~ "An Ancient Muse"
2007 :~
Julie Fowlis ~ "Culidih"
Type O Negative ~ "Dead Again"
2008 :~
Goldfrapp ~ "Seventh Tree"
Blackmore's Night ~ "Secret Voyage"
Mike Oldfield ~ "Music of the Spheres"
Capercaillie ~ "Roses and Tears"
Fleetwood Mac ~ "Perfect Days" (archive live & studio)
Éamonn Doorley, Muireann Nic Amhlaoibh, Julie Fowlis, Ross Martin ~ "Dual"
2009 :~
Mediaeval Beabes ~ "Illumination"
Julie Fowlis ~ "Uam"
CD re-issues of 1970's LPs :~
Fleetwood Mac ~ "The Original Fleetwood Mac (2000) [1971]
Mellow Candle ~ "Swaddling Songs" (2008) [1972]
Trees ~ "The Garden of Jane Delawney" (2008) [1970]
Trees ~ "On the Shore" (2008) [1970]
Vinegar Joe ~ "Vinegar Joe" (2008) [1972]
Vinegar Joe ~ "Rock and Roll Gypsies" (2004) [1972]
Vinegar Joe ~ "Six Star General" (2008) [1973]
16
Answers