To the Egyptians, Ka was the life force part of your soul.  When you died, it was your ka that left your body and, presumably, the ka of your 100 cats that were buried with you.  (This, according to Wikipedia anyway, so it's probably actually Ko, the Persians, and bats).  Either way, a life force iPod ep that turns out to be rather good:

Kaleid (When Worlds Mix) by Depeche Mode (probably the last of their good instrumentals)

Karaoke Soul by Tom McRae (dig the violins, the most urgent McRae ever stirs himself to)

Kare Kare by Crowded House (from their brilliant Together Alone album, one which I've twice given as a gift, so you know I mean it)

Karma Police by Radiohead (skipping over Karma Chameleon, a song everyone owns but nobody likes)

Kashmir by Led Zeppelin (the worship of Zep has always eluded me, but this song makes me think of P Diddy and Godzilla and I laugh through all 8 minutes of it).

Next up, the iPod of Loo.

(and while we're talking music, can someone please stifle the career of Duffy?  Seriously, people.  Amy Winehouse for Anglicans)