I don't think evolution disproves the existance of god.
It certainly disproves literal applications of Genisis and the Jehovah style God as a truthteller via the bible - but both those things are already thoroughly discredited anyhow. If someone belives in that, it's not for want of proof it's not an accurate explantion of the universe.
All evolution really does is open up the spiritual quest to broarder and deeper thought and investigation with more accurate information about the origin of life and the universe than the Jehovah/Jesus/bible idea allows for.
Maybe 'god' is out there but of a very, very different nature to what people's religions tell us 'he' is.
I say that becuase it's hard to see the difference between what enlightend religionists and athiest scientists say sometimes once you get past the 'I [do/don't] believe in some sort of a god' banner statement.
Max