Wow!! So far I have found three great spots to enter to win a silhouette sd. What is that? It's awesomeness!!
Check out fireflies and jellybeans...it's an awesome blog and worth your time http://firefliesandjellybeans.blogspot.com/
Another great giveaway spot is a bowl full of lemons: A bowl full of lemons.: Silhouette GIVEAWAY!!!!: "A SILHOUETTE GIVEAWAY!! I was sent a Silhouette Rhinestone Starter kit this month, to try out and giveaway along with a Silhouette SD Mac..."
And the other is familylicious.com
If I could only win this I could expand my crafting! Check out the company too: http://www.silhouetteamerica.com/
This site is dedicated to giveaways!
So, good luck!