I must admit I really don't seem to be able to understand how the Google API key story works. It seems that it is a paid service and I did activate my billing information. However I now see an area in my Google API page that says Simple API Access and it looks something like this.
Key for browser apps (with referers)
API key: XXXXXXXXXXXXXXXXXXXXXX
Referers: Any referer allowed
Activated on: Mar 25, 2012 6:56 AM
Activated by: xxxxxx********com – you
Obsolete key: XXXXXXXXXXXXXXXXXXXX
Status: Active until Mar 26, 2012 6:56 AM (This I really don't understand as this date changes all the time)
So is this the API key I am supposed to be using with billing or do I find another one some place else