EPS export from Plantuml is now in beta testing; this patch makes it available through org-babel.

To generate an EPS from Plantuml, give your source block a ':file' with the extension '.eps'.

If you want to include the EPS files in PDF generated from org-export, include the line

    #+LaTex_header: \usepackage{epstopdf}

in your org file.

--Mike Gauland