From Unofficial Sony Ericsson Blog, the new Walkman phone borrows a group from the design of new G705. The similar square shape, the same display and front-facing camera positioning.

Rika has devoted music keys instead of the traditional navigation pad included in the G705. Also, the Walkman handset has a brushed metal finishing, which makes it look pretty distinct
Rika should bring Wi-Fi, GSM and HSDPA connectivity and a camera of at least 3 Megapixels.

Panasonic launch their HSDPA phone, Panasonic MIRROR II 824P.

Adopting a 3 inch QVGA LCD screen, the phone supports T-DMB, a 2Megapixel camera with auto focus and shake-reduction functions, and built-in memory cards with up to 2GB of microSD.
Panasonic MIRROR II 824P measures 49mm x 107mmx 15.9mm.