"Bricks and clicks" virtual agencies are becoming attractive business models for PR pros who like the flexibility in location and staff recruitment that such online enterprises provide.

Though lacking the physical assets of traditional PR firms, "virtual" agencies have carved out a niche in the industry, mainly driven by the lower costs they offer.

While many freelancers today pass themselves off as such, a true virtual PR agency is an incorporated business existing almost exclusively online.

Such businesses are not exclusive ...