From: Jason Harrop <jharrop_at_gmail.com>
Date: Thu, 23 Apr 2009 08:10:54 +1000

JAXB currently doesn't work on Google's AppEngine. Vote for issue
1267 to change this (see below).

They have a "JRE White List", and you can't access a class in the Java
standard library (the JRE), unless it is on the list.

The list is at http://code.google.com/appengine/docs/java/jrewhitelist.html

None of javax.xml.bind.* is on it :-(

There is an issue 1267, which you can vote for to help change this:
http://code.google.com/p/googleappengine/issues/detail?id=1267

cheers .. Jason