I've found out about the Sunshine thing, although I don't understand completely.
1. Dante Smith (Mos Def) and Kayne West collaborated on a song called Sunshine.
2. The song samples a song from the musical Hair (Let The Sunshine In); and interestingly it was on a single as a medley with a song called Aquarius. I've got a feeling the inspiration behind Aquarius may have sprang from there; the wiki article also talks about the song being based on the astrological belief in the age of Aquarius.
The interesting wiki article here:
http://en.wikipedia.org/wiki/Aquarius/Let_the_Sunshine_In
3. So logically, since it said it was a sample, the song (
http://au.youtube.com/watch?v=IMOy9SsUQ7U) should contain a BoC sample. But I can't hear one I recognise. Any takes on it? The funny strings sound BoCish, but I can't pick it.
EDIT: ""Please Tell Me Why" "Boards of Canada"" on Google returns
THIS very strange result.
To summarise:
Teen Scene Vol. 02
Artist: Various Artists
Released: 2004
Record Label: Norton
Recorded At:
A VERY strange thing for Boards to be on.
And apparently you can listen to previews OF THE SONG! but you need iTunes!

I'll have to download that right now.
EDIT #2: I got iTunes, and listened. It's not Boards of Canada; it's some band called Boards. I think that copyright may have been a labeling error. If you want to listen to it, make sure you're searching iTunes Plus; it doesn't come up otherwise.
EDIT #3: Definitely an error. The record I linked to is actually Fort Worth Teen Scene Vol. 3, not Vol 2; and it's a band called Boards. It's a 60s garage/psych rock compilation.