An Esato forum member has created 2 new concept phones for Sony Ericsson- the K880i and Z810i.

K880i is the successor of K850i and has GSM/EDGE 3G (HSDPA) networks. It also features a 5.1-megapixel 1/2.5 CCD-camera with auto focus, xenon flash and 3x optical zoom and a frontal SVGA-camera. It supports Bluetooth 2.1+EDR with A2DP profile, A-GPS-functionality, a dual storage card slot, a Walkman 3.0 player, ???-chip and Nvidia GoForce 5500. Looks like the best phone of Sony Ericsson packed with features.

Another one is Z810i a clamshell to replace the Z800i. It comes with a main OLED QVGA 260K color display and an external OLED 176×220 pixel display, a 3-megapixel CCD-camera with auto focus and a self-portrait mirror. In addition the Z810i is armed with A-GPS, Wi-Fi 802.11 UMA, FM-radio with RDS, Walkman 3.0, 3D stereo speakers and Nvidia GoForce 5500 graphical adapter. The phone supports GSM/EDGE and 3G (HSDPA) networks and comes in 3 colors: metallic blue, shiny red and sunlight yellow.

Source: Esato & Mobile Review