Samsung today introduced its BlackJack business smartphone in the U.S., adding to Cingular’s growing portfolio of enterprise devices. Samsung now joins Nokia and Motorola as a major handset vendor looking to attack Research in Motion and Palm’s dominance of the high-end e-mail centric business segment.

The BlackJack has UMTS/EDGE data capabilities and runs the Microsoft Windows Mobile 5.0 OS, scoring another smartphone win for the PC software maker. Sporting a Qwerty keypad, the handset is geared toward push e-mail users, but unlike other smartphones released in the space, Cingular does not appear to be supporting BlackBerry Connect. Instead Cingular is using Good Technology’s e-mail solution as well as Microsoft’s Push Direct.

In other handset news, children’s phone maker Firefly Mobile announced a licensing deal with Warner Brothers to develop a new line of phones around popular cartoon characters such as Tweety, Superman and Supergirl. Firefly said the new phones will be available this month through its carrier partners and through Firefly’s MVNO.

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