Got this from my hosting company:
Our engineers have reviewed your site and have advised of the following:
every time a link is clicked on the top menu, (home/forum/fanzines/merchadise/gallery/songs/etc....) a new php process is started.
changing from one link to another is causing 25-50% spikes.
would recommend that customer contact wordpress for info on how to close the php processes when a page is navigated away from and on how to reduce his overheads
The site is http://www.thejunglebhoys.net/jb
Can anyone help me out there - dont have a clue what they are on about or how to solve the problem - they have put me onto a backup server and will delete the site at the weekend if the problem is not rectified asap.