Do you have to collect a thousand dickpics yourself before you can make a mosaic portrait for your favourite colleague or are they included as a template?
Other source images are available. Rather than dick pics, I thought it better to use the contents of her wedding album to generate a portrait of my sister, for example.
For anybody wishing to roll their own in a similar vein, http://www.andreaplanet.com/andreamosaic/ is what I've used in the past.