The strategy generally looks good, though I admit the preponderance of query params starts calling into question a more general Map-based strategy. For the moment though, looks good. Thoughts?
http://codereview.appspot.com/823042/diff/9001/10005 File java/gadgets/src/main/java/org/apache/shindig/gadgets/uri/ProxyUriManager.java (right): http://codereview.appspot.com/823042/diff/9001/10005#newcode90 java/gadgets/src/main/java/org/apache/shindig/gadgets/uri/ProxyUriManager.java:90: public ProxyUri setFallbackUrl(String url) { unused? http://codereview.appspot.com/823042/show
