Bit late, but as others have said the words Atheist and Agnostic are slippery. I call myself an Atheist and not an Agnostic because some people think Agnostic means "err I dunno what I think really...." and because I used to debate on here with someone who said they were Agnostic yet believed in god. They were just unsure of the details.
Professor Dawkins described 7 main positions.
1. Strong theist. 100 per cent probability of God. In the words of C.G. Jung: "I do not believe, I know."
2. De facto theist. Very high probability but short of 100 per cent. "I don't know for certain, but I strongly believe in God and live my life on the assumption that he is there."
3. Leaning towards theism. Higher than 50 per cent but not very high. "I am very uncertain, but I am inclined to believe in God."
4. Completely impartial. Exactly 50 per cent. "God's existence and non-existence are exactly equiprobable."
5. Leaning towards atheism. Lower than 50 per cent but not very low. "I do not know whether God exists but I'm inclined to be skeptical."
6. De facto atheist. Very low probability, but short of zero. "I don't know for certain but I think God is very improbable, and I live my life on the assumption that he is not there."
7. Strong atheist. "I know there is no God, with the same conviction as Jung knows there is one."
Professor Dawkins described himself as a 6, not a 7. So he doesn't believe there is no god as people often assume.
That's my position too. Atheist, but I don't claim to rule out the chance that some god of some kind might exist. Especially if we're talking about a god who made the universe and then went away. How would we know?