Commenter reactive pointed out ping.fm, a website which in fact I use. ping.fm allows you to update one site, through a variety of means, which will then pass those updates on to 32 other websites.

ping.fm amazingly allows updates to be textual or graphical (you can set ping.fm to upload images to Flickr etc.). The ability to send videos is going to be launched soon.

The site will ‘ping’ most major social networking sites updates: Twitter, Pownce, FriendFeed, Facebook, MySpace, del.icio.us and Jaiku. Smaller ones like Kwippy are also supported.

Updates can be sent through instant messaging (GTalk, MSN, Yahoo! or AIM), unlike Twitter at the moment, from iGoogle, Facebook, an iPhone, WAP or SpinVox (a service which allows a voice to be converted to text on a phone). This is in addition to email (and therefore MMS, and on some carriers SMS) and the web.

With ping.fm it’s just as quick to update all your social networks as it is one. It is only one way however, and other peoples’ updates will not be received using it. Another similar service, which is a little more complex is imified.