As usual, this promotion can be found by clicking on the "Sponsored Link" window that now sits at the bottom of the FarmVille game page. Once you click on the link, a new window will appear, where you'll be asked to upload a photo fitting into one of three themes: Light, Wind, and Water.
You'll see a large "Upload" button, which will take you a page where you can "donate" one of your photos. You can voluntarily do this, as donating a photo that GE deems appropriate for the theme will result in an charitable donation on your behalf. However, once you click on the Upload button, you'll see the famous "You've earned for Farm Cash" text in the top right corner of this new window.
Whether or not you choose to actually upload a photo, simply close this new window and your Farm Cash total in-game should automatically go up by two. If not, a quick refresh of the game should do the trick of adding the Farm Cash to your account.
If you like free Farm Cash - and who doesn't - keep checking back with us, as we'll make sure you're the first to know when new opportunities arise.
Did you choose to actually upload a photo in this event, or did you just stay long enough to earn your Farm Cash? Let us know in the comments.