BlackBerry's worries mount

After its 21% plunge on Friday, BlackBerry maker Research In Motion (RIM) continued to bleed on Monday, with its stock further diving almost 7%. At $25.4 now, RIM stock is at its lowest since 2006.

After its 21% plunge on Friday, BlackBerry maker Research In Motion (RIM) continued to bleed on Monday, with its stock further diving almost 7%. At $25.4 now, RIM stock is at its lowest since 2006.

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It also suffered a setback as its digital marketing head Brian Wallace left for Samsung on Monday. This is the third high-level exit since February.

In yet another major blow, Seesmic — which builds applications to help users build and manage their brands online — abandoned RIM on Monday in order to focus on Apple's iOS, Google Android system and Windows Phone 7.