A number of you have been contacting me over this appearing on Google:
In short, nothing to worry about, it’s all in hand, just waiting for Google to process the site before removing the warning.
In long, we were running WordPress 2.2 which was vulnerable to hacking and someone hacked it. Nothing major, just a bit of link spam. We’ve upgraded to the more secure WordPress 2.5 and cleared away all the spam so all it right with the world.