— JuiceCaster on T-Mobile: Social networking service JuiceCaster is launching on T-Mobile USA in May, which will put the application’s 6.0 version on 12 of its top handsets. The service, which allows users one-stop access to a number of online social nets, including MySpace, Facebook and Twitter, will cost $2.99 for unlimited use. T-Mobile joins Alltel (NYSE: AT), US Cellular and Cricket Wireless as US operators who provide JuiceCaster to their mobile subscribers (release).

— Fring Launches VoIP App for iPhone: Israeli firm mobile community and tech firm Fring has launched a beta mobile VoIP application for the iPhone, which will let its users access all of their online social networks using their handset’s WiFi connection. iPhone owners will also be able to make free and low cost mobile calls over their WiFi. The service is free to use. The year old company claims to attract 100,000 new “fringsters” a month, who are spread over 180 countries (release).

— CricInfo Widget for iPhone: ESPN (NYSE: DIS) subsidiary cricket site CricInfo has launched a mobile widget for the iPhone. Cricinfo Mobicast, created by widget tech firm Plusmo, provides iPhone owners with easy access to the online site, which includes ball-by-ball commentary and updates, scorecard, match schedules, news, photos and podcasts from cricket experts. The service is free, though users must pay the data charges (release).