Mumsnet will be offline this evening (Thursday) for a major upgrade. This will start at 10pm and should be complete in about an hour.
Apologies for any inconvenience.
After the work you should hopefully see a significant performance improvement at busy times. We are making some other infrastructure upgrades too, but nothing you'll notice; it's just boring stuff to do with making the site more resilient in the face of problems.
No prizes for the first person to post "Oh no, I might have to talk to dh". And for anyone curious, your due date would be 18th June 2009.