Original article with the confirmation from a "Tesla official":
Tesla Says Its Talking $1 Billion Deal With Toyota - AutoObserver
A longer article from AutoObserver also mentioning it:
Tesla Talking $1 Billion Deal With Toyota? - AutoObserver
[Didn't find the article on autoblog green, though]
Tesla Says Its Talking $1 Billion Deal With Toyota - AutoObserver
A longer article from AutoObserver also mentioning it:
Tesla Talking $1 Billion Deal With Toyota? - AutoObserver
[Didn't find the article on autoblog green, though]