That seasoning will help the company as the category contracts, said its CEO, Jerry Sheer. "We've got eight years behind us. We understand the space more than these new players."

The company is also banking on its J2EE-based platform, which is ideal for large enterprises, Sheer said.

Sparta will apply advanced analytics and metrics to derive meaning from social networking data. "We're going to do some very interesting things," Sheer said, adding that a social network is essentially a "focus group on steroids."

That strategy ties into a trend Owyang sees: companies offering "insight, intelligence and data" about online communities. There's yet another related category as well, the analyst notes: firms pushing Web collaboration offerings.

From the wide range of choices, G-Unit Records picked Ning, a company formed by Netscape cofounder Marc Andreessen. Ning targets both consumers and businesses with its hosted offering.

Chris "Broadway" Romero, who oversees digital media at G-Unit Records, said Ning was the right platform for rap star 50 Cent's social networking site, citing its ability to "stand in the background."

"Unless you're an administrator, you don't have to see their name too much," he said.

Romero said Ning "could run a little faster," but mused, "Every time you add someone with the power of 50 Cent, it's going to bend the walls of any system out there."

Seventy-five thousand people are members of the site, according to Romero. That growth was driven by person-to-person referrals, not traditional advertising, he said. "It's definitely the way of the future," he said of social networking as a marketing tool. "Everyone should do it."

It may not matter much if enterprises find themselves with fewer offerings to choose from down the road, he suggested: "It's more about the person's vision than the tools, most of the time."