So the XC6VLX240T will likely make it possible to implement a PPC accelerator 
The catch is that the free version of the programming software ISE likely won't support it. Otoh one can combine multiple chips.
The best price I can find for the XC6VLX240T is $1412.40.
Not really a good idea.
You can get a XC5VFX30T, which has a PPC 440 cpu built in for about $450.
