acknak wrote:I've never tried it myself. Does the report builder do anything that you can't do manually inserting fields in a Writer document?
It prints whole tables in various layouts whereas the fields print one document per record. The tables can be grouped by categories, years, months, quarters, whatever.
It puts totals and subtotals for the respective groups into headers and footers.
Like Calc, it can generate charts and fairly complex calculated fields.
Unlike Calc, it includes picture fields (pictures as "cell contents").
It would be the most professional tool in the whole office suite if somebody would maintain it (and the Base component, of course).
Example document with some simple report builder reports by sliderule: 
http://www.mediafire.com/?q6ksrpaowgk6lsv