WordPress.org

Can I display different users on the same page?

Yes. As many as you want. Each can have their own number of Tweets displayed as well.

How do I overwrite the default styling?

The default defines '.twitterList' and '.twitterList li'. To overwrite these just be more specific by adding the following to your CSS:

ul.twitterList      {}
ul.twitterList li   {}

Then add whatever style you want.

Can I style each user separately?

Yes. It was programmed with this in mind. Each instance adds a class of the username to the containing ul element.

Add the follwing to your CSS to style each user:

ul.username { }

Then add whatever style you want.