Mobile users away from their computers have had a handful of options for directory services in the past couple of years. There's TellMe (555-TELL), FREE-411, CALL-411, and GOOG-411 to name some of the free ones. There are also the official ones from each of the carriers that are billed a la carte--and usually at a high price.
This morning FREE-411 (one of the older services of the crowd) has announced a partnership with a useful driving directions service Dial DIR-ECT-IONS to help people find phone numbers and addresses for businesses or residential listings along with step-by-step directions for how to get there. The service starts next month in three major cities (Los Angeles, the SF Bay Area, and Chicago) and then nationwide in April.
This is immensely helpful if your handset isn't on a data plan, or you're away from a phonebook or map. Competitor TellMe, which is owned by Microsoft, has had such a mixed feature using its downloadable phone app, but no such service for its text, or 800-based phone services.