Yes, it is worth it. Will make it a lot faster than stock speeds. I tested with UberKernel @ 1.5 GHz and I'm currently using unixpsycho 1.7 GHz kernel in the testing feeds and it's even faster. Do it. It's easy, and it is reversible.
I just wanted to report back real quick. Overclocking to 1.5GHz was so fast and easy and the results are WORTH IT. The touchpad should have shipped out like this by DEFAULT. All those reviews that bashed it for lag wouldn't exist !