Here is a link to a wonderful blog entry about Saudi women driving from the Saudi Woman blog written by a Riyadh native and mother of three named Eman Al-Nafjan. The blog is great. The entry on driving has two wonderful video clips and many comments.
As an aside, to pile on arguments in favor of Saudi women driving, a few years ago, I met a prominent Saudi female economist. She told me that the sheer amount of cash flowing out of Saudi Arabia to foreign drivers would be so much better reinvested locally...if families didn't have to pay for drivers. It would help diversify the economy, and would give those with fewer means the wherewithall to consider doing things like opening a service business.