I bought 2 from SAC a while back when they had them for $19.99 each. They're fantastic. I have a Petzl XP2 also which I love, but the deal on the old model SPOTs are awesome.
The 2011s might be a fantastic light, but the old models are some of the best around for most users. You might get a 30% better model in 2011 but you'll be paying 200% more for it.
It was a great purchase for me, and I'd recommend it to anybody.