eAuthorize 3.5 test accounts

Yes. A test account for both Verisign and Authorize.net are included with the demo download of the plugin.
These test accounts will help you explore the benefits of the eAuthorize plugin without requiring that you go through the process of obtaining your own account.
With the test accounts, you can see how transactions work through the Verisign or Authorize.net networks, and verify your connectivity to them.
Authorize.net:
Login: wmotiontest
Password: 5wmotion123
Verisign:
Login: wmotiontest
Password: 5wmotion123