Hello,
you've problably seen the "Reta Vortaro", it's a big Esperanto dictionary, providing information about Esperanto-words but also translations of them into many languages:
http://www.uni-leipzig.de/esperanto/voko/revo/
Example: dog http://www.uni-leipzig.de/esperanto/voko/revo/art/hund.html
It's downloadable in XML-format and - it is free under GFDL! http://www.uni-leipzig.de/esperanto/voko/tgz/index.html
I think it would be great using this as a basic database of the new Esperanto-Wiktionary (http://eo.wiktionary.org), but because of the XML-format it should be easy to create word indexes of other languages.
There is just somebody needed who knows how to convert the XML-structure into Wiki-Code and how to import this into the existing Wiktionaries.