I wrote an entry about students writing for an authentic audience, teachers can also present the wonderful work they do for authentic audiences.
My board encourages such endeavors through their sponsored conferences. They are usually advertised through MyLearningPlan. Teachers can either attend such conferences or present at such conferences.
Other conferences are organized by various groups. Teachers can either attend or present at such conferences. Here is a short list.
The unconferences. Various cities around the world organizes unconferences, free of charge where each participant come with an idea to discuss with the group. The conference is participant driven. Each participant can leave with several more ideas they brought with them. It is also possible to follow unconferences online with their #hashtags
There are the very inspiring science conferences from the Science Teachers Association of Ontario.
http://stao.ca/conf2/conference.php
The conferences from the Ontario Modern Language Teacher’s Association:
http://www.omlta.org/upcoming-events/fall-conference-2013/
There are the CRIFPE iPad Summit in Montreal:
http://www.crifpe.ca/colloques/view/505
There are the conferences from the Ontario Association for Environmental Education:
http://home.osee.ca/annual-conference/ecolinks-2014-2/2014-speaker-suggestions/
The American ISTE conferences:
https://www.isteconference.org/2014/
There are the TED, TEDx and TEDx Youth conferences.
Last but not least, there are the Qatar Foundation Education Conferences.
http://www.wise-qatar.org/wise-summit-2013
Several of those groups also share many of their presentations online. Why not present your successes?