iOS: Previously mentioned DLNA media-streaming app Skifta was only available for Android, but now the developers have released a client for iOS. It takes some of the media already on your iPhone (or other iDevice), or from media servers on your network, and allows you to send them to any DLNA-compliant television set.
I set it up quickly by choosing my iPhone as a content source and started sending photos to my nearest TV. They appeared right away, and I was able to easily display a slideshow.
Unfortunately, Skifta didn't seem to pick up on any of my iPhone's video or music content. I'm not sure why it can access only my photos, but hopefully this is just a bug in the first version. Since I have a Plex server elsewhere on the network, I was able to use Skifta to send media from it to my television as well. Despite a few glitches, it managed to stream the video without any major issues.
While this release seems a bit buggy, it should eventually turn out to be a solid DLNA streaming option for your iDevice.