The following was posted on the twitter development talk forum by Alex Payne.
Due to abusive behavior we’ve been forced to temporarily disable our
Jabber/XMPP services. PubSub subscriptions, tweet deliver, updating,
tracking, and all other Jabber features will be unavailable until
further notice. We’ll attempt to resolve this as soon as possible.
Apologies for the inconvenience.
Tweetmeme relies upon this Jabber/XMPP feed so the site will not start working again until Twitter re-enables the feed.
The source of the problem? The spammers, we have seen a massive increase in the scammers/spammers trying to abuse twitter and it would not surprise me if they had found new and interesting ways to use the jabber interface to do naughty things.
We hope twitter will sort this out soon as we have a load of new features we were working on for tweetmeme, so watch this space.
For updates on what we are doing in the future on tweetmeme/fav.or.it follow me on twitter
UPDATE: Twitter have posted a blog post about it. They now hope to have everything back up and running by sometime Saturday (US time)