Ultrasoundpodcast.com is an amazing resource for all things EM Ultrasound. Produced by #FOAMed advocates: Mike Mallin (University of Utah), Matt Dawson (University of Kentucky), and Mike Stone (Boston).
Check the website and subscribe to the podcast.
They have also produced the ebook 'Introduction to Bedside Ultrasound Vols 1&2' available FOR FREE on itunes and Inkling.com.