Got lucky on Glastonbury tickets this year. Have to go by coach from London but hey-ho, its better than watching on the bbc, no matter how good they get at it.
When I went in 2004 I was running Windows on my home PC and had an updated wallpaper using the glasto webcam. Getting it working was long-winded and I was interested to see if I could do the same on Fedora.
I found the following script on Ubuntu brainstorm which is a bit nasty.
Dropping something like:
wget -N $URL -O $PREFIX
into cron.hourly or editing crontab with a faster cycle rate as required should suffice. Edit as required for any other webcam image.
Then specify the downloaded image for your wallpaper and it will update automatically when a new image comes in.