Everyday Matters Group posts challenges for artists each week. There are over 150 challenges posted there today, Jan 24, 'o8.
I've belonged to EDM for a number of years, but have only completed a handful of the challenges. I've been thinking about doing all of them; so this is the first new one to be added to the collection.
The collection may be viewed by clicking on the picture. It will take you to the Set I have over at Flickr.com. Give it a try.