The iGoogle Image of the week is a little Gadget for Google's "iGoogle" Product.
This small gadget displays the "OpenStreetMap image of the week" on your iGoogle website.
You can easily add it to your iGoogle page by using this link: http://www.google.com/ig/adde?moduleurl=http://www.deadly-dreams.de/osm/iotw.xml
The xml file linked above includes just an iframe. This inline-Frame is connect to the iotw. A cronjob on my server checks daily (weekly would be enough, but who cares?) for an new image and saves an link to it in a file (iotw.htm) on my server. That's all. No Spyware added on my side (but maybe on Google's one ;)