Chicago--After a handful of failed efforts, it looked like b-to-b incubator Divine Interventures would finally get its initial public offering off the ground this week. But the company announced yet another postponement, this time until next week. Chicago-based Divine has twice delayed its IPO in recent weeks, and recently switched investment banks to expedite going public. The company is trying to sell 14.4 million shares at $13 to $15. Ironically, the b-to-b incubator area has fallen in disfavor as few b-to-b companies--including those spawned by incubators--have managed to cash in with lofty public offerings.