Was just cogitating on possible definitions of twitterate. I had considered these:
1. twitterate (n.) Literate in twitteracy.
2. twitterate (n.) Rate at which tweets are tweeted.
3. twitterate (v.) To rate the tweets of others for such qualities as informativeness, aesthetic joyfulness and artful persuasiveness.
Checked Urban Dictionary, which seemingly draws on reiterate:
Please feel welcome to add further definitions.