One of the big shifts in the marketing paradigm today is in the relationship of customers to the sales process. The broadcast marketing model was all about persuading customers to buy (by interrupting with effective, outbound messages). The P2P marketing model is based on inspiring customers to both buy and advocate your brand to others (by providing relevant products, service, content, and dialogue).

Last week’s BusinessWeek cover story showed the new model at work – in the nascent growth of Mac computers in corporate environments. The Mac may finally be getting some traction in companies outside of the traditional niche of design and communications firms.

The intriguing part of the story is that this growth is happening despite the fact that Apple has no corporate sales force. This is intentional. Steve Jobs has argued that companies can succeed by focusing on corporate or consumer buyers, but not both. (Agree? Comments? Counter examples?)

What is driving the Mac’s entry into the corporate environment is that managers are finally giving in to growing requests from employees to bring a Mac into the office place. Companies like IBM and Cisco are allowing pilot programs where a few dozen employees are allowed to switch from Windows to Mac OS, in order to gauge the impact on the organization. (Has any manager ever been faced with employees clamoring to allow Windows into the workplace?)

Part of this shift may be driven by the catastrophic roll-out of Microsoft Vista last year (like many, I’m sticking to my XP guns). But the Mac “pilot” programs are also testament to the power of inspiring a community of customers to support your brand, rather than persuading them to buy from you because they have no other viable choice.