Infuse version 2.3 is now available. This video app from Firecore (known for their Apple TV jailbreaking work) now has UPnP and DLNA streaming for easily watching video from a media server on iPhone or iPad from XBMC, Plex, and other similar utilties. As well, handy gesture-based controls for playback are now available, along with a variety of other tweaks meant to make the experience better. See the whole list here.
You can download the latest version of Infuse for free right now.