Sorry Roger - this question was probably aimed at me, and I missed it. I don't remember any NASCAR drivers making the switch to F1, not many people switch from closed wheel racing to open, I may be wrong. Obviously Juan Pablo Montoya is the biggest current NASCAR driver who used to drive F1. I think Jacques Villeneuve drove NASCAR after his F1 stint. There have also been quite a few drivers that switched from F1 to Indy/CART. I remember Nigel Mansell was very successful in the early 90s, the Andrettis have also been involved in F1. There are a few names in the current Indy driver line-up that look familiar from smaller F1 teams from a few years ago. I don't get to see Indy at present so there may be more. Some drivers do switch from Indy/CART to F1. Jacques Villeneuve started in IndyCar, as it was then, before moving to F1. Alex Zanardi also tried to switch back to F1 (he did F1 before Indy) after his US victories, but couldn't duplicate his success. From looking around the web, Alex has droven a few cars since his accident despite having 2 prosthetic legs. There was meant to be a US team in F1 this year (USF1), but the recession caused them to withdraw. Otherwise there aren't many US drivers around. Of course with Indy and NASCAR to watch, F1 has always been less popular in the US, and the US hasn't even made an appearance on the F1 calendar since the debarcle which saw only 6 cars compete in the 2005 US Grand Prix at Indianapolis. F1 did return to Canada this year (one of the most exciting races so far), and returns to the US in 2012 at a purpose-built track in Austin, Texas (don't know if daisydukeXenosstrait is a motorsport fan). If you have any other F1 questions, feel free to ask - I'm certainly not an expert and, despite watching each race, my memory is terrible for F1 stats.