The University of Minnesota is hosting a US moodle conference or "Moodlemoot" as they are called.
There is a call for presentations which are due by Tuesday June 9th. Here is the link for more information: https://mootus15.moodlemoot.org/mod/page/view.php?id=19
I have been to a few moodle moots and they are a good place to learn about moodle, help drive the development and meet moodlers of all persuasions.
If you plan to submit let me know as I am on the selection committee.