I agree- it's wearing a bit thin.
Besides, it's become a meme from the Left, the Media, and their handmaidens- it's not like you'll never hear it again... :)
The left is still pushing it though. Randi Rhodes on Air America is the worst offender. Literally everything is Bush's fault. No matter what event is in the news, she spins it to be Bush's fault. It's all she ever talks about. The other hosts on AAR sometimes talk of different things, but not her. She's Mrs Johnny-one-note.