Microsoft is doing a contest with Bing to highlight Windows Live Photo Gallery. When taking your photo, you should think about how the photo can draw people in as a starting place for exploring Bing. It should strive for subtlety and poetry. For e.g. if the photo was taken on a day of celebration, you shouldn't have to know that it's Halloween, Columbus Day, or Mother's Day to enjoy the photo.
To enter the contest, send your submissions to WLcontest by Oct'22nd with 'images, title, short description of image, your first/last name, and contact email address.' A panel of judges will select 10 winners; their photo featured in a Windows 7 Theme Pack Personalization Gallery. Grand winner's photo will be on Bing homepage US-English homepage on Nov'8th.
More Info: Competition Rules