You got an email? from Twitter or UberMedia? I haven't received anything from either party except these tweets.
Edit: On second thought, I don't know what sort of personal communication standard I can hold UberMedia to. I don't think you actually need to register with them to use the client so they might not know who their users are to contact them. Well, apart from the 2.5 million twitter followers their account has.
I don't know the details on whether UberMedia asked for your email, but Twitter can email any Twitter account that has authorized UberTwitter regardless.
Promoting your own app to all users of a rival client you've just suspended raises a few (quite possibly unwarranted) suspicions about their motivations. If they wanted to avoid that they could have mocked up something akin to the "Browser Choice" Microsoft got pushed into offering.
They're offering users who probably just want to use Twitter easy/quick access to an alternative client so they can get back to tweeting. Given that the app they used to use was banned for privacy violations, the fact that it's the official app is probably a good thing in terms of trust.
Support: UberTwitter, twidroyd, and UberCurrent have been suspended due to policy violations. Read more here: http://t.co/HHGa9k1
Support: Want to keep using Twitter on your phone? Download an official Twitter client here: http://t.co/rxwSYuW