Many apologies for the very short notice. BDUG will convene today! Quinn Dombrowski will be talking about entity relationships.
Relationships are a powerful concept that allow you to do more with Drupal views. Let's say your Drupal site defines content types that represent courses and instructors. Using relationships you can connect instructors to courses. Then you can create a view that produces a webpage showing course information and include details about the instructors that teach them.
For those of you familiar with SQL, a view is analogous to a query, a relationship is analogous to a join, and I suppose you can think of content types in terms of tables.
This might sound pretty technical and complex to some of you, but I believe that Quinn plans to break this all down into bite sized pieces. Bring a laptop. There may be opportunities to follow along with the presentation.
Berkeley Drupal Users Group: 4/22/13 12-1:30pm
WHERE: UC Berkeley Campus: Barrows Hall 60 (basement room)
MAP: http://groups.drupal.org/berkeley/map

Comments
A hands-on presentation!
To follow along with the presentation:
1.1 Double click the zip file (don't expand the .tar and .gz files inside that)
1.2 Import the code and database and files into a local development environment like Acquia Dev Desktop, Mamp, Wamp. etc.
Or use a free Pantheon site.
Pantheon site import instructions
https://dl.dropboxusercontent.com/u/7713778/Re_%20BDUG_%204_22_13%20%28T...
Video of this presentation
Video is here: http://youtu.be/M1FK9XTMF3g