Mixendo is the platform to unleash your creativity and easily build advanced mash-up web applications.
MiXHR is the first Mixendo service and offers seamless service to enable cross-domain XMLHttpRequests in your mashup applications by simply including a script tag. No mandatory registration, no code rewriting: just follow the steps and choose an access mode.

So, wheres the code, or is this a useless Extension that can not be used in a real world?
Help! I got damn XML that needs to be accessed and parsed over cross domain and its driving me mad.. Onto a JSONP hack.
Hello John,
unluckily our cross site proxy is currently unavailable as a service. We did not collect enough interest to be worth the time and effort to support a public service. Apologies for this – I guess you are good for a JSONP solution!
WoW, is my comment. Hardly an intelligent response to an advanced piece of script writing, but, that’s all I could muster at this time of the AM.