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There's another new mobile tool that may be just what Facebook and Twitter addicts crave-or dread. JuiceCaster for BlackBerry, available here, facilitates instant uploads from your smartphone to your social networking profile.

In addition to connections with the hottest social networking sites, JuiceCaster also promises easy multimedia updating to your blog on Blogger, LiveJournal or Typepad.

JuiceCaster lets you invite friends to follow your status updates and you can establish groups to receive your photos and videos simultaneously. It also lets you connect in real-time with other JuiceCaster users. If you really get hooked, there's an option to install the JuiceCaster player on your desktop, too.

On the homepage, click the "sign up free" button or look in the bottom-right corner for directions on joining via text or by entering your mobile phone number. There is a beta version for the BlackBerry Curve. If that's your device, be sure to click the ad for it on the homepage.