JFBConnect has Twitter Card support, starting with v6.0.0. On your pages, we'll set the basic Twitter Card values for "Summary" cards right now. We don't support alternative cards yet, though that's coming. Generally, the Twitter card values for title, description and image will all use the same values set for the Open Graph tags on the page, which are done automatically via our Open Graph plugins, manually by using the {SCOpenGraph title=xyz} tags on-page.
We've also developed the
Social Debug meta tag tool
to help test your Twitter Card and Open Graph tags and what should be displayed on multiple social networks when your content is shared.
I hope that helps, but if you have any questions, just let me know.
Thanks,
Alex