Mobile social networking specialist JuiceCaster this week said it now has client software for Research In Motion’s BlackBerry Curve and that others versions are due by Sept. 5.

Although so-called moblogging is not typically considered a business task, there are more college-age people starting to buy BlackBerrys and more business people starting to use their BlackBerrys on personal time, Juicecaster CEO Nick Desai noted.

Pricing is not yet determined.  The company is in discussions with carriers including AT&T and T-Mobile.  Juicecaster is also considering an advertisement-supported model and there could be multiple tiers of service, he said.

Also on deck are applications for other BlackBerry phones, versions for European users, support for uploading media to YouTube and an additional round of venture funding.  More details plus additional Web and device support will be announced at the CTIA show in San Francisco next month.

The company’s software is currently in version 6.1.  Users get different feature sets depending on whether they’re using a simple WAP browser or an advanced client application.  Juicecaster has numerous competitors, but few that are so focused on mobile-to-mobile sharing.