@acoolidge
Twitodon https://twitodon.com/ serves as a connection point - if they have a mastodon and used Twitodon at any point, it'll recommend their mastodon profile to you. Even if they haven't, it'll register your twitter and mastodon association, so others can find *you* in the future.
There's also Fedifinder https://fedifinder.glitch.me/ that lets you check for the people you follow, and automatically extract any mastodon account mentioned in their Twitter profile.

#twittermigration #twitodon #fedifinder