using a samsung n110. bought it a month or so ago. i also bough a 2Gb stick to go in it ( have read the instructions that samsung give you, it's just a flap on the bottom to open up. piece of p ), but haven't got around to it yet. it's hardly gasping, running xp. the n110 is pretty much silent as far as i can tell, and comes with 6 cell battery as standard ( rated to run for 7-9 hours ), but is a shade over 300 quid. basic spec is very similar to nc10, so if you're not too bothered about the touchpad size and battery life, you can probably save a good few quid sticking with the older model.
i bought at currys, and saved myself 20 or 30 quid by doing 'reserve and collect' through their website.
lovely bit of kit. really like it.