We're going to be doing some essential maintenance on Sunday morning. The site may well be offline for a short time, starting around 10am, but we'll keep it to a minimum. If for any reason "a short time" starts turning in to a longer one, you'll be able to get updates by looking at Mumsnet on twitter, which you can find at:
twitter.com/mumsnettowers
For the technically minded (and this would only impact them, so don't worry - if you're not sure if this is relevant to you, it isn't!) we're going to be changing the IP address of www.mumsnet.com. We will of course be updating our name servers to point at the new address, but if you do anything funky with the IP address you'll have to update after we've made the change.