I'm going to regret asking this, but hey.
Current laptop (Acer 8371) is faulty, retailer gone under & have no more so probably going to end up with a refund.
Requirements:
<15" screen,
8+ hour battery,
<£400 (unless exceptional value),
Dual core CPU (not an Atom),
RAM unimportant (DDR3 would be nice, got 8GB spare),
GPU unimportant (HDMI would be nice, though),
HDD unimportant (500GB HDD spare),
OS unimportant (Got a spare copy of Windows 7 Ultimate),
Happy with a refurb/second hand as long as its worth it.
I use my laptop for Uni, which means it needs to have a long battery life so it can go all day without charging, and it's used for coding / databases / graphics work (next year) / the odd report.
Best i've found so far.
(and the first person to suggest a 15.6" laptop with a 3 hour battery life deserves a banhammer...)