I think Rush people should get on their web site (if they even have one) and let them know how you feel.
People joke and threaten their own personal boycotts, but the sad fact is that the left is very successful at scaring national advertisers away from conservative talkers while the right is uniquely unsuccessful at punishing left wing talkers.
No matter how nasty and outrageous the quotes are on MSNBC or Current TV you still see mainstream national advertisers advertising there everyday.