ive still not received my rewards what ive collected yesterday and all my fellow racers i race with has received there rewards
I was just about to start the same thread. Dunno whassup with that. Never had this issue before. I restarted from the start screen 3 times then turned the system off and back on and still nothing. Wanted to finally buy my Shelby Daytona Coupe 
No need to start new threads when we already have one (right on the first page of the forum) on this topic. See this post and please use that thread for further discussion:
http://forums.forza.net/turn10_postsm81039_Forza-Rewards-discussion.aspx#post_81039