According to a joint press release from Leap Wireless and Samsung, their flagship Cricket Wireless will feature samsungs siren (SCH-a870). This is the first samsung cell phone on Cricket Wireless and could be a sign of phones to come. The phone itself features a compact and sleek design with an array of multimedia features. Such as, VGA-camera with flash and zoom, advanced voice recognition, MMS, and VibeTonz® technology, which allows users to download and feel the beat of ring tones.

This phone is a great phone and has some glowing reviews:
CNET Review of Samsung SCH-a870 Siren
Phonescoop User Reviews of Samsung SCH-a870 Siren
Amazing BIG Photos of the new phone.

You should be able to see and purchase this new phone on the Cricket website.