Short of my old server (which I don't have now), I too switch everything except the adsl router and gig switch off. The reason for the adsl router is because of the way BT et al do their line sync speed calculation, and the generic reason is because combined they draw something in the region of 2w total.
I'm also a little too old-fashioned to fully trust the 'shut the laptop lid' hibernate, even though it works waaaaay better in Windows 7 than before. I just remember the joy with PCMCIA stacks under Windows 3.1 with laptops