Georg Jaehnig wrote:
It's downloadable in XML-format and - it is free under GFDL!
No, under GGPL.
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.
I any case, this would have to be done individually for each Wiktionary, as they use different templates (and some use no template at all).
I believe the best thing to do is to create some page colleting info about free dictionary resources and leave any decisions and actions to respecitive Wiktionary communities.