I have an account, I can log in and everything, but I don't know what to do now to get my key. Google's site says download some code kit, and I did, but I don't know what to do with it. I just need the key.
Google, have a look at http://www.google.co.uk/intl/en/apis/ you don't need a key but it certainly helps the inpatient
If you have created an account at http://www.google.com/apis/ Then you might have got an email with the API key. Check your inbox.
It sort of feels like I'm going in circles. google.com/apis tells me to create an account. I then use my gmail as my email, and they tell me I already have an account (which I know I do). Then the only thing about APIs I can find is google.com/apis.