You might want to check out the BBS at Colin's web site CHECK IT OUT
if you have not already done so.
As with all discussion boards, there is a certain amount of BS, but there is a good group of racing fans who are very well informed about all things related to racing. Colin posts pretty regularly and his dad posts all the time, and you can get a lot of the inside view of what is going on.
The last official tests will be at Barcelona this weekend, with all teams present. There will be a final televised test period (unfortunately not in the US) with the fastest qualifier getting a BMW M5