In the run-up to Mobile World Congress we've been treated to a windfall of hot new phones and technologies. Then there's Sony Ericsson's W395 Walkman and C903 Cyber-shot. The W395 is a new Walkman slider with built-in stereo speakers meant for the "youth" market, a market that seemingly hates 3G or storage since the quad-band GSM/EDGE device ships with a measly 1GB memory card. It will, however, be affordable and feature a 2 megapixel camera when it ships in Q1. The C903 Cyber-shot slider already spotted around here a few times brings a 5 megapixel autofocus camera with sliding lens cover as we've seen -- give the cover a slide and this cameraphone's ready for duty. The came