In the last months, there hasn't been a lot of activity (the last tweet was from August 2). This has been mentioned several times in chat (e.g. here). There were ideas to automate tweeting, but currently, it doesn't seem like this will be implemented soon (this is just my impression, please correct me if I'm wrong).
As a compromise between automated tweeting and having nothing, I'd like to propose to create a tweeet sandbox here on Meta. In my eyes, this is an easy-to-implement method to lighten Peter's workload and increase the Twitter account's activity.
I think the "tweet sandbox question" should be created by one of the site's moderators. Every answer to the tweet sandbox question would be a possible tweet, and my idea is that hereby the community creates a repository of tweets. When an answer is tweeted, it could be edited (prepending something like "Already tweeted.") so the same tweet isn't set off twice. It might be a good idea to have a moderator convert the sandbox question into a community wiki (see this FAQ answer on Meta Stack Exchange for details), to lower the reputation threshold required on Meta sites for editing posts.
I guess we should just make sure that it's clear that every contribution to tweet sandbox answers might be posted on the Twitter account - I am not a lawyer, but I could imagine this being necessary to ensure that the poster grants the rights that their content can be reused according to the Twitter Terms Of Service (maybe they should be linked).
What do you think of this idea?