one quick followup on this, if I may...
The Twitter account I registered the app with provided consumer keys /
secrets and I used those keys with the client's access tokens to
successfully get and post to the account using OAuth. Great. Many
thanks to those who pointed me in the right direction.
I actually have two separate Twitter accounts to do status updates for
depending on the content I have. Sometimes in immediate succession.
Is there a way to retrieve the consumer keys for the other Twitter
account I own without registering an app?