TweetMeme has announced that they are shutting down their platform next month.
They are currently in the process of converting their own buttons to the ones powered by Twitter itself.
Their API is being discontinued as well. Web publishers using their buttons are recommended to verify everything is working once the transition is done.
The company said:
It has been two years since Twitter launched their own button and as part of the final TweetMeme transition, the TweetMeme button will over the next 24 hours be switched over to the Twitter button (the ‘web’ TweetMeme button will immediately look like Twitter buttons). Please note that this will happen automatically and no action needs to be taken from your end.