Hi,
I wrote a little parser extension to MediaWiki called "RomanNumerals". It converts arabic numerals into roman numerals.
Example: "1976" into "MCMLXXVI"
For more details and download see: http://meta.wikimedia.org/wiki/RomanNumerals
This is my first extension and it may not be perfect. So I'm really looking forward to your feedback.
Cheers, Jimmy
... from Germany