I'm starting to talk myself into the Wizards here, but I want to give Kane an opportunity to respond.
In the front court, I'm not sure that Artest is going to hurt the Wizards much if they use Wallace as a primary helper to shut down Griffin. I think a Gortat / Gasol / Wallace front line can largely neutralize the Blake / M. Gasol lineup.
In the back court, Westbrook is clearly the best player. However, Curry will make him work, and I trust Williams/Smith/Billups more than I do Rip/Jackson. Again, Wallace's ability to roam off Artest will at least cut off some of Westbrook's penetration.
Basically, I see Artest as worthless in this series. I wish Boston had a better wing to play in front of him, but I'm not sure that Jackson is the answer.
From Washington's end, I'm not sure why they're playing a zone, as it seems gimmicky and unnecessary. I think if they just play straight up defense and allow Crash to do what he does best on that end, Boston could have some issues.
I need to think on this more, though, and I'd especially appreciate Boston weighing in on how to lessen Wallace's impact on defense. I agree with Who that Wallace won't be a huge factor on offense, but I do think he'll contribute more on that end than Ron Ron. However, I see Wallace with the potential to be really disruptive to what Boston wants to do.