ST-Ericsson was already in some tumult after the ST half of the partnership said it was exiting the venture late last year. As we're discovering, there was a little more drama in store for 2013. CEO Didier Lamouche has resigned from the company for a tempting job prospect elsewhere, and there's no named replacement for him so far -- a slight problem when Lamouche will be out by March 31st. He's leaving ST-Ericsson in a better state than he found it, as the company is scoring key deals for phones like the Galaxy S III Mini while getting its LTE chip plans on track. Nonetheless, we suspect that remaining owner Ericsson will want that power vacuum filled quickly when there's already enough uncertainty ahead.