Marti at http://essenceofpaper.blogspot.com/2011/07/owh-4th-of-july-blog-hop-weekend.html has a challenge for OWH weekend of challenges. Her challenge is Subway Art. This is new to me and I hope I am interpreting it correctly - to use patterned paper with words that relate to the image. The theme is childhood memories.
other challenges: Stampin Sisters in Christ - CAS http://stampinsistersinchrist.blogspot.com/2011/07/challenge-96-psalm-4610.html
Clear it Out - CAS -http://clearitoutchallenge.blogspot.com/2011/06/all-about-keeping-it-simple.html
Digi Doodles - anything -http://digidoodleshopsbest.blogspot.com/2011/06/challenge-65-anything-goes.html
Really Reasonable Ribbon - picnic summer fun - http://reasonableribbon.blogspot.com/2011/07/challenge-27-picnicsummer-fun-theme.html