Just go here to enter:
I just entered by submitting a pic of Sam having "Water Fun" (this week's theme) and for entering, received a promo code for some free prints (though I'm not sure if that includes free shipping).
Here's what Shutterfly has to say about its contest:
"Summer is here and that means you’ll be taking more photos of your family soon! Between beach trips and BBQs, photographs are a great way to capture these summer memories. Shutterfly’s Long Live Summer Photo Contest on Facebook launched on Monday July 9th and it runs for 5 weeks.
Win a trip for four to The Bahamas and a professional photo shoot so you’ll remember your vacation forever. All you need to do is upload your favorite photo and caption based on the theme of the week. Get a gift from Shutterfly just for entering! You can enter at any point during the 5-week sweepstakes period.
• Week 1(7/9): Americana
• Week 2 (7/16): Great Outdoors
• Week 3 (7/23): Water Fun
• Week 4 (7/30): Sports & Activities
• Week 5 (8/6): Parties & Celebrations
PRIZES• Instant win prizes just for submitting a photo!
• Weekly prizes (contestants can enter one time/week)
• Weekly featured photos: up to 5 weekly entries will be selected from the gallery and featured on the Facebook fan page.
• Grand prize: trip for 4 to Bahamas, 4 nights, family photo shoot
• Shutterfly Sweepstakes - Official Rules"