Commerce USPS is a cool module that helps us to integrate information obtained from USPS web services into the Drupal Commerce checkout. It uses product weight, store's zip code, shipping address zip code, and the type of service (express, priority etc) and gives us the exact cost.

In any shopping cart, there is a common requirement to be able to say that billing and shipping addresses are the same, as the customers will certainly not appreciate having to enter the same information twice.

Drupal Commerce can use various payment methods through contrib modules, however, as of now there is no module that directly supports InternetSecure payment gateway. 

Drupal Commerce may not always be easy to use by the store owners and administrators, as the product creation is not very intuitive. Different product options as stored as different products. This makes sense: package with two pounds of rice is physically different than a package with ten pounds. Blue and green shirt can have different inventory numbers.

Drupal Commerce is a relatively new e-commerce framework. As someone with significant Ubercart experience, I was initially reluctant to use Commerce, however, now that I have worked with it I think that it is a good module with a great approach. By leveraging views, rules and entities, everything fits much better into Drupal, and in particular Drupal 7 paradigm.

This session talks about View Modes.  Not to be confused with the Views module, View Modes are different types of displays for you content.  The most common example is the Default and Teaser view modes that you get out of the box with Drupal nodes.  The great part about view modes is that you can create the display once and reused it all over your site.

This video goes into a lot of detail of all of the different Panels modules within the Drupal 7 universe, and there are quite a few.  Here are some of the more useful ones that were mentioned.

This session dives deep into how large web development shops handle deployment of websites that see heavy traffic.  In talks a lot about the concept of continuous delivery.  The talk is somewhat of an overview of a wide range of topics, but it provides a ton of helpful information and starting places to begin building out your companies website deployment strategy.  The talk covers three basic topics: development workflows, testing, deployment.

This video goes into great detail of all of the new features available in Drush 5.  Drush 5 has added a bunch of helpful enhancements to the already amazing Drush system.

This session provides a good overview of Views and especially understanding Views 3 after working with Views 2.  The video shows a bunch of the features of Views that people might miss.  These features can be really handy in more specialized Views configurations.  The session also gives a quick overview of how to extend Views to add support for any specialized case that you might run into with your specific Drupal site.