I fear that I have never really been an instrumentalist... unless you consider voice as an instrument... so absolute pitch never meant much to me. If it's in my range and register, I can sing it.

But the geek in me finds the subject interesting... so here is a nice piece on the subject:

http://www.audiology.org/news/editorial/pages/20081117a.aspx

I have been taking lessons to help gain some musical literacy, though slow progress what with life constantly getting in the way.