Looks good!
http://codereview.appspot.com/27054/diff/1/3 File java/gadgets/src/main/java/org/apache/shindig/gadgets/oauth/OAuthRequest.java (right): http://codereview.appspot.com/27054/diff/1/3#newcode470 Line 470: String b64 = new String(Base64.encodeBase64(hash)); specify UTF-8 when creating string http://codereview.appspot.com/27054