Thanks to the combination of digital work and increased global assignments, PR's recent momentum continued in 2007. However, economic uncertainties cloud the future.

Many agencies submitting rankings to PRWeek reported healthy double-digit increases, and some holding-company firms that declined to report revenues because of their interpretation of Sarbanes-Oxley likewise intimated very successful years.

Both general interest agencies and specialty shops reported successful years, bolstering the argument that PR is making strides in multiple industries. Agency CEOs ...