Think about it. AT&T desperately needs to improve the profitability of its network, which will be complicated by the relentless treadmill of network upgrades to catch up with iPhone demand. Foursquare, 1 million users strong and growing fast, is now branching out into commercial services. This could add a significant revenue stream to AT&T’s top line, and AT&T’s salesforce could accelerate the adoption of such services.

Yes, it’s a market that AT&T may not understand well, but the company already sells telecom services to businesses, so it has a ready-made list of leads to pursue.

Read the full story at CNET News.com.