The article walks through creating both very simple and somewhat complex reports. It also covers adding bind variables, customizing the bind dialog and creating drill down reports.
SQL Developer has a lot of report development functionality and I think it will just get better over time. Setup is really minimal (just need to unzip and connect to a database) and if you can write basic SQL you can write basic reports. The more complex SQL you can write, the more complex your reports can get.
There are a lot of users that should never get near a tool like SQL Developer (more for their sanity than anything else) but it’s a great new tool (free at that) for power users and analysts in addition to developers and DBAs.
I also like my mini-bio at the bottom. It’s the first article I’ve had published that mentions my ACE-hood. heh