I also find this very useful and would like to see it added to spring-mvc. Is this still being worked in? I do have one suggestion though I usually wire my beans by interface not implementation I would like to see something more like this:
'public static MockRestServiceServer createServer(RestOperations restOperations)' I had to change that to use it properly in my code I don't put getters for the RestTemplate in my code like was done in spring-social.
Also you might want to run sonar/pmd/findbugs etc as it raised some flags on some random things like failure to close a BufferedReader in the ResponseCreators class.
Thanks for your work on this Craig!