Joyride, the nice guide/tour library based on jQuery, does not work in older version of jQuery (like 1.3 or 1.4). We had a Drupal 6 project, where we wanted it. Our Drupal 6 site used jQuery 1.3 version. We tweaked the joyride code to make it work in jQuery 1.3. Basically,
1. We included a function that is not a part of 1.3 version (isEmptyObject)
At KnackForge we use Drush more often as a part of Drupal development projects. As Drupal developers, we frequently feel the need for getting the most recent database dump from live site. When I did this recently, it was relatively a big site, thought it would be nice to skip a few tables that are not essential. At least to avoid unnecessary time spent on I/O operations. This is one of the few things that I have least tried with Drush.
Ardent team at KnackForge always love to get hands dirty with challenging projects. In this connection we recently took an interesting newsletter sending project from one of our potential clients who is doing relatively big in Internet marketing.
In brief, we were asked for a custom system for sending out newsletter emails, based on Drupal. Tentatively 600k emails to be sent per month. A newsletter list shall have up to 80k users and limited to a couple of lists to begin with.
WYSIWYG (a.k.a HTML Editor) has become a De facto for quickly formatting and publishing contents from dynamic site like Drupal. This is certainly a time saver and prevents from getting hands dirty with HTML.
In this connection, CKEditor has been a pioneer and around in use and development cycle for a decade (first release was on March 2003, in the name FCKeditor).