Sony's successor to the Vaio W netbook made its debut a little prematurely earlier this month, which has now been followed by its first unboxing and preview. Encased in an appealing matte black plastic, the Vaio M is set for an April launch in the UK at the very reasonable £300 ($456) price point. Unfortunately, the drop in price also means a lower-res 1024 x 600 display, while the W's chiclet keyboa