Well this has taken a long time to get going. Mostly because I've been playing with Drupal modules and fiddling around with the site in general. I guess the main thing I've learnt is how to handle some issues with css between firefox and IE.
So as to avoid anyone else falling in to the same trap it appears that using float in side a span tag doesn't work in side Firefox 1.5 and if you've added an image inside the span then it's hidden. For those interested there's a discussion on the drup img_assist forum about this see: http://drupal.org/node/63703
