Will the last remaining person at Research In Motion (Nasdaq: RIMM) please turn off the lights on the way out?

Chief Legal Officer Karima Bawa has become the latest exec to resign from the BlackBerry parent.

Losing its top attorney may not seem like such a bad thing. It sounds like the punch line to a lawyer joke. However, it's just one more person who has decided that the grass is greener somewhere else.

Some RIM hires may not have a choice. Some reports hint at 2,000 layoffs coming later this week, and sources tell Reuters that RIM's goal is to trim its workforce of 16,500 employees down to 10,000 by early next year.

Execs bolting and pink slips looming aren't going to help morale at the company. Then again, the writing is on the wall.

We're living in a world of Androids and iPhones, and BlackBerry is fading fast.

According to IDC's Worldwide Quarterly Mobile Phone Tracker, 82% of the 152.3 million smartphones shipped during this year's first quarter were either Apple (Nasdaq: AAPL) or based on Google's (Nasdaq: GOOG) market-leading Android operating system.

It's easy to see why. Apple is the premium brand in mobile. Google makes Android free for any handset manufacturer to use.

The swift migration to one of two platforms is hurting RIM's proprietary operating system. The market share for BlackBerry devices shipped has fallen from 13.6% during last year's freshman quarter to a sad 6.4% this time around.

The trend is undeniable, and many argue that it's irreversible.

RIM will get smaller. It doesn't have the financial resources that Microsoft (Nasdaq: MSFT) has to push a fledgling mobile platform on consumers and businesses. It can't just embrace a rival operating system the way Nokia (NYSE: NOK) did when it threw its weight behind Microsoft's Windows Phone.

RIM will continue to shrink at every level, and you don't need to be a departing legal eagle to see that.

RIM shot
There no denying that the next trillion-dollar revolution will be in mobile (and that's not just lip service; it's the name of a new free special report that you can check it out now). However, no one seems to be inviting RIM to the revolution.