I never call directory assistance from my mobile phone. Not because I'm too stubborn to ask, [okay, maybe I'm too stubborn] but because it costs $1 each time you use it! That's just ludicrous. And ridiculous. It's Ludiculous!
But the days of wishing I had the phone number to the pizza place and just going hungry or driving around because I'm not willing to pay for the phone number are over. Today I learned about a service called Free 411. I know, it sounds kinda like a scam, but I did a little bit of research [at Snopes, where else?] and it turns out it is for real. All you've gotta do is point your phone to 1-800-FREE-411 and an automated / voice activated directory service helps you out. You do have to go through about 15 seconds of advertisement, but I'd do that to save a buck.
Although i have yet to try it, I more than likely will the next time that need arises. I don't want my money to go into the $8,000,000,000 that Americans spend on mobile phone directory service every year.