iPhone/iPod touch only: Flickr's got a nice iPhone-optimised site, but the free Flickit application is its truest friend on an iPhone or iPod touch. Choosing, detailing, and uploading photos with Flickit is beautifully simple and convenient. After grabbing Flickit from iTunes and installing, you'll have to give it credentials to access your Flickr account. Conveniently, it loads the Flickr authorization page within the Flickit frame, and then you simply hit "Done." You then select whether you're going to shoot directly for Flickr or pick from your screenshots/web grabs/synced library. You can then give each pic all the details you'd offer in a web-based upload—descriptions, tags, sets, even geographic location—and select multiple photos to be uploaded at once. It gives Flickr uploaders a bit more control over their uploads than most shoot-and-upload apps or hacks, and it all works to seamlessly get your photos online. Flickit is a free download for iPhones and iPod touch models running at least 2.0 firmware.