I love card sketches! There are sooo many places on the web to find sketches! Here are some great places to start looking:
Split Coast Stampers - Wednesday Card Challenge
Prairie Paper and Ink
Page Maps - Card Maps
Oz-Some Stamps (Monday sketches)
Triple the Sketch
Here's a sketch from me. This is an update of an older sketch I made for my old yahoogroup.
Have some fun with it and try it out! I'll post a card based on the sketch later this week.