While looking at a good TrackIR racing game to get (I'm a flight sim fan first and foremost, but love the screech of tires and the roar of the engines too!), I was on SimBin's website looking at Race'07 and noticed that Volvo - The Game was recently released. I went to Volvo's website (http://www.volvocars.com/game) and downloaded the game and lo and behold it supports TrackIR 5! It's a free game but wasn't on the TrackIR games list or in the free games/demos sections either, so I thought I would post information on it here.
BTW- I ended up getting Race'07, though rFactor and GTR2 were strong contenders, but Race'07 was $8 with free shipping from Amazon and had very good reviews!