If you’re a heavy-duty Flickr user, you might want to hit “Update All” under the iPhone App Store: the official Flickr app has just received a swell new update, including support for HD video uploads from the iPhone 4.
If that’s not enough, the latest version of Flickr for iPhone brings multitasking support with background photo uploads, Twitter support, fast app switching and enhanced full-screen browsing behavior, as well as the ability to clear recent searches.
Don’t have Flickr for iPhone yet? It’s free, and you can grab it here.