T-Mobile USA has launched JuiceCaster 6.0, the mobile social networking service, on 12 of its top handsets.

JuiceCaster lets users share pictures and videos directly from their cameraphones to more than 20 top online social-networking and blogging sites, including MySpace, Facebook and Twitter. Version 6.0 allows users to post and watch real-time video status updates on their mobile devices as well.

T-Mobile will offer JuiceCaster for $2.99 a month for unlimited use on approved handsets. Alltel, Cricket Wireless and US Cellular also have made the service available to their subscribers.

JuiceCaster is a product of Los Angeles-based Juice Wireless. The company is supported by investments from Qualcomm, Citizen’s Communications and 21 Ventures.