Check out Moxie Fab sketches! My favourite of the four is the horizontal sketch challenge. The deadline for this challenge is September 19th, so make sure you stop by their blog and enter!
I am also entering this in:
Less is More - Things that Move
Penny Black: Touch of Whimsy, and Airmail
Hero Arts: Anytime Messages
Lawn Fawn: Admit One (I used the balloon string for the bee)
Spellbinders Classic Scalloped Squares
Tim Holtz Distress Ink - Tumbled Glass