Reporting botnet spam?

My system gets regular spam from botnets -- it's annoying, and the 
volume has been on the rise (frequency).

Is there an RBL or place where these attacks can be reported.

These are generally dynamic pools, but not all RBLs are up-to-date on 
this material.   Seems reasonable that there could be an RBL that tracks 
botnet activity and can be used in DNS similarly.

Thanks.