We've been using Display Suite with Node displays on one of our latest sites. It was an experiment, and possibly not something we'll do again - DS offers some great functionality with build modes and ways to re-arrange fields and all sorts on nodes, but since we end up theming most nodes quite a lot anyway, it's not worth the extra hassle that Display Suite can add when you want to change the theming on DS fields, layouts, change the fields' settings etc...
These three tools (drush make, Aegir and Dropbox) have come together to produce a release system that means I don't have to ssh into a remote server to deploy a new version of site. This means that I can do releases really, really simply, and actually with nothing more than a web browser1. Let me explain:
Creating extra field formatters in Drupal 7 is fairly simple, but it can take some poking around in the new Fields code. So here is some sample code to make it easier for you! You can add formats to your own fields -- or existing fields that are defined by other Drupal modules. This is the case for the following example - a formatter for a link field to display the URL as an absolute URL.
There's a new function in Drupal 7: template_process_page(), that gets called aftertemplate_preprocess_page(). This new function is where page titles and breadcrumbs will normally be added to the page.tpl.php variables. Read on for more info on how to override or remove these variables in your theme.
Not the most exciting of articles this, but thought I would share the browser stats for the ComputerMinds site - given less than 8% of traffic is coming from IE I think you can probably draw some conclusions as to the type of visitor we get :)
When building forms, you will often want to only provide certain options if other options are chosen by a user. For example, there's no need to show the 'open link in new window' checkbox, if the 'make this into a link' checkbox hasn't been ticked. These kinds of dynamic forms haven't been easily available for Drupal... until now, with the #states for form elements in Drupal 7.
To make one form element be dependent on another element, you may have delved into AJAX, or tried using CTools for form item dependency. Doing it with AJAX isn't simple, and using CTools isn't always an option and includes various caveats. Now, you can make dynamic froms in Drupal 7, straight 'out of the box'!