Yes.
It shows that Al Queda is weak. They haven't been able to launch an attack such as this inside of the United States since 9/11/2001. So now they are settling for attacks closer to their support base in a place like Saudi Arabia.
That tells me that we must be doing something right: Because given the chance I'm sure they would much rather attack the US on US soil. In short, they are losing their ability to reach out and touch the average american.
Al Queda's base of operations is narrowing. And even in places like Saudi Arabia, the pressure is being turned up on the terrorists.
If anything, this attack will end up giving the Saudi government more justification for cracking down on the terrorists and their base of support.
Scott