Ron Garriques, who has been leading Dell's mobile communications group ever since its formation a year ago, is leaving the company. Ron originally joined Dell in 2007, after a high profile career at Motorola, and has overseen a rather ambitious entry for the company into the phone industry. Now Dell is folding the communications unit into its "core operating structure," and Garriques won't be along for the transition. Of course, it's not like there haven't been some missteps and head scratchers along the way (we still don't know