There is no announcement at all that the series is finished. None at all. The guy who started this posting gets miffed because A1GP's press officers ignore his e-mail requests for information. Right Dick?
And I think pending something official (or even a story on a reputable news-carring website), there's nothing new to add here...
"I said to the man who stood at the Gate of the Year, 'Give me a light that I may tread safely into the unknown.' And he replied, 'Go out into the darkness, and put your hand into the Hand of God. That shall be better than light, and safer than a known way.'"
- Minnie Louise Haskins