Some of them have worked for Walgreen's way before they knew this was coming.
Your personal physician has the freedom of conscience not to perform any procedure or dispense any medication, recommendation, or advice they deem violates their personal code of ethics. I would assume you would opt for a phycisician who might not prescribe to you a medication having nothing to do with reproduction he/she deems dangerous/less safe or recommends an operation you don't really need just to make a few extra bucks.
I find this hypocritical and a double standard.
Walgreens has a lot more political clout in Illinois than many customers combined and could have stood behind their employees while this has been going down for months. Instead they weigh in on following an unjust law and corporate profits. I hold both Walgreen's and Governor Rod Blagojevich culpable. This is just the tip of the iceberg of future medical ethical situations that will arise.
Obviously what Walgreens is doing is not ideal -- after all, they shouldn't be selling abortion drugs in the first place. But on a scale of what you'd expect from corporate America, they're ok.