We've been mourning the loss of Spa for quite a while now...apparently, since the circuit was "upgraded", it isn't homolugated for bike racing!
You are absolutely right in that it's a brilliant track - all the teams, riders and fans had the same affection for it as they had for Le Castellet.
Things change, though...and with rumours of the Osterreichring coming back in 2010, it's not inconceivable that Spa - and even Le Castallet - could be back
