Mobile, it seems, remains one of the few bright spots in venture capital. Bob Borchers has left his post as Apple’s senior director of worldwide product marketing for the iPhone to join venture capital firm Opus Capital as a general partner,  the WSJ.com reports.

The 43-year-old Borchers, who first arrived at Apple (NSDQ: AAPL) in 2004, has worked on the iPod as well as the iPhone, and gained a bit of fame as the calm, bespectacled host of some of the company’s iPhone “guided tour” videos.

He is a former Nokia (NYSE: NOK) and Nike exec, and said that while working at Apple was “amazing,” his new position at Opus will allow him to make investments in mobile technologies—an opportunity he “couldn’t pass up.” Borchers said he would be looking at the “range of white spaces in the mobile world,” including health care and mobile marketing.

Opus, the VC firm, has more than $1 billion in committed capital and currently has four partners. Its last fund, from which Borchers will be investing out of, raised $280 million in 2006.