http://google-maps-utility-library-v3.googlecode.com/svn-history/r172/trunk/arcgislink/docs/examples...
Yeah...I noticed too that a bunch of them didn't work...there are some that do:
http://google-maps-utility-library-v3.googlecode.com/svn-history/r172/trunk/arcgislink/examples/laye...
http://google-maps-utility-library-v3.googlecode.com/svn-history/r172/trunk/arcgislink/examples/laye...
I would suspect that it has to do with some if the underlying ESRI sample servers they have referenced but I didn't check into it. I've had pretty good luck getting the samples to work with our AGS services.
Good luck!
-Mike
map.overlayMapTypes.insertAt(0, agsType);