There's also a WordPress plugin called "Jetpack". Both are so different areas, that I don't think it matters much. If it happens that either project is actually bothered by mine and reaches out to me, I'll be happy to talk.
I've checked for name conflicts in related areas, in package repositories (FreeBSD ports, Debian's and Ubuntu's archives), major open source hosting services, and haven't found anything related. Let me know if I missed anything relevant.
I'm the team lead of the Jetpack plugin for WordPress. I've passed it upstream to our in-house counsel just for a cursory review should it conflict with trademark scope or something.
(What do I know, I'm a dev, not one of those lawyer-types)
(But as the Mozilla Jetpack thing existed before we did, and we both coexist, I'm not expecting a kerfluffle, but who knows -- I am not a Lawyer!)
Thanks for taking care of that! Please let me know if your legal team finds anything wrong. If you need to contact me, either open a GitHub issue on the repo, or email me (maciej at 3ofcoins dot net).