OT: Decent GUI-based reportwriter for Linux?

Not really a PG-related question, but we are looking to migrate a
customer from Oracle on Windows to PG on Linux. The only problem is that
the company is already using reportwriter tools like Crystal Reports and
Oracle's reportwriter. They are open to be migrated if we can come up
with a reportwriting option for them to use on Linux against PG.

Perl and PHP are not really an option as the reports are layout-intensive
(i.e. Putting in graphic presenations of data and also being
pixel-accurate with lines, logos, etc. If I was to draw a picture I
wouldn't use C or Perl to draw it, I would use a paint app like the Gimp!
This is their argument for wanting to use a reportwriting package that
can publish to PDFs, HTML, et al.

Anyone got any ideas? I guess that the best choice here is Java or
similar, but anything will do provided that it does the job.

Thanks,

Brad