Would it be possible to setup reverse proxying from the wikipedia domains to the toolserver. I.e: have http://en.wikipedia.org/tools/ reverse proxy the content from the toolserver http://tools.wikimedia.de/ ( http://en.wikipedia.org/tools/~dschwen/wikiminiatlas/label/en_0_0_0 would fetch the content of http://tools.wikimedia.de/~dschwen/wikiminiatlas/label/en_0_0_0)?
This would avoid the cross-domain scripting prohibitions, and allow toolserver developers to incorporate AJAX functionality into their scripts. Yeah, I know, by now most of you will have foam around their mouths from utter annoyance by that overused buzzword. But there is a real use for AJAX (there, I said it again ;-) ).
The [[Meta:WikiMiniAtlas]] uses it to display labels on the map. It currently uses an ugly iframe workaround which splits the JS code in two, one part on meta, the other part on the toolserver. With the reverse proxying the whole code could reside in the wiki, the iframe could be dropped, and GMaxwell could add Lupin's popups to the atlas (and they would not be confined to the tiny iframe). It would make life a bit simpler for toolserver developers...