Reporting support for Rails app


hello all,
i am very much excited about rails and would be delighted to work on it.
However, before i can use it for commercial development, i need to know
that it has requeired support for some issues, for example, is it fully
support excel and pdf reporting, if so, can i relay on it. In j2ee we
use display tag library for showing list. Does rails have anything like
that? Does it have any library for graph generation for web app.

it would be a great help if anybody could clarify these issues.