Comment by tamplinjohn: Opera is unlikely to ever be supported -- they don't have an open extension API that provides the access to the JS interpreter needed, and the NPAPI support is very limited.
For more information: http://code.google.com/p/google-web-toolkit/wiki/UsingOOPHM --~--~---------~--~----~------------~-------~--~----~ http://groups.google.com/group/Google-Web-Toolkit-Contributors -~----------~----~----~----~------~----~------~--~---
