Google Sites: setting an icon
Custom icons on a goggle site is possible. Point your browser to http://www.genfavicon.com/, upload a picture and select the 64×64 size (this is supported by google sites). Pick out your favourite part of the picture, then download the ico file.
Now you will need to upload the .ico file into sites. Load up the site, go to ‘More Actions > Manage site > Attachments‘ and upload it there. If there is an existing favicon.ico then you will need to write over it. Once you have uploaded and save, refresh the page and bam; it should be there with your new favourite icon!
You can also use photoshop to do it, create a 64×64 image, and download the save as ico plug-in from telegraphics.