One iphone app I'm in love with right now is Instagram.
Its perfect for fashion bloggers to take quick shots of outfits, or anything of inspiration.
You can add a variety of different filters to your photos and it uploads your chosen photos to its mobile community to share with friends.
You can also choose to automatically post the photos to twitter, tumblr, flickr, posterous, foursquare and facebook as you upload them onto Instagram.
Bad news: Not available on android/blackberry
Good news: Its free!