hey @pharesim,
Thanks for a great tool.

I gave it a try, and while the whole process worked fine for the email invite, it failed at the last step giving an error stating problem creating the user (at steeminvite.com while attempting to create the account post approval). At the time of the popup at the last step, the username field was left empty. Even when i adjusted it via firebug and inserted the username, it failed again.
Also noteworthy is that the recipient got an email too that "One of your steem invitations was accepted", while this shouldn't go to the recipient, more to me, the initiator.

I finally was able to get the account running properly via avoiding the email invitation approach and using the direct one, which properly loaded the account name into the box, and created it successfully.
Just thought of running this by you for further troubleshooting. I was using Chrome throughout the whole process, in case you need that info:)

And thanks again!