We do, but we're not a law firm are we. But, I find that less than 50% of the people we talk to about our services have looked at the pricing page before speaking with us and, frankly, are surprised when they find out we do publish pricing.

My advice to law firms would be to do this, but with caution.  Lots of caveats about scope of work, changes to scope (project creep) etc during a matter.  Or, if you do do "fixed price" services then publish and stick to, those prices.