Yeah, it's a shame nano boards aren't more popular (see the picture next to the can of coke in my last post!) or powerful.
I did have a look at the Netgear boxes, they look pretty good - fairly pricey, but I guess that's to be expected. As for rates, the Synology ones are very highly rated in most of their reviews - not sure how that would scale though. For the £300 range, that's looking towards the DS211+ which has similar read specs but half the write speed (ouch!).
So yeah, Netgear looks like a good option if I go for spending a bit more - have you had any experience shoehorning your own flavour of Linux onto one? Ease of setting up a webserver is a big factor - data storage is secondary
I couldn't find much documentation on the Netgear, though the specs are encouraging.