Yes, I heard about the proxy trick but have only seen php examples. My final code however will go on 3 load balancing servers and i'm not sure my company would like to add/manage another dependency to their processes. Especially since Flickr could completely change to oauth 2.0 as they profess to doing 'shortly'. I think the best bet would be to go back to the 'old established' authentication method.
No, not really. All you need to do though it create a page that accepts a URL as a parameter, and then download that URL and return its contents to the caller. There are plenty of examples out there for most languages.
I don't know if you have used such a technique but if I call for a thousand links they will all come through the proxy....so a streaming proxy might be the best way forward. Once I have the links I should be able to go direct to the flickr server farm. Is this the case ?