It's not uncommon in more complex themes to have many different block regions, and even dynamic regions that will only appear on certain pages or when viewing nodes of certain types. One very common use-case is to have both a page.tpl.php, and a page-front.tpl.php, each of which print out different regions, particularly for ads or promotions.
Defining block regions is super easy; simply add a couple lines in your theme's .info file:
If the ongoing social networking revolution has you scratching your head and asking, "Why do people spend time on this?" and "How can my company benefit from the social network revolution?" you've got a lot in common with Harvard Business School professor Mikolaj Jan Piskorski.
Only difference: Piskorski has spent years studying users of online social networks (SN) and has developed surprising findings about the needs that they fulfill, how men and women use these services differently, and how Twitter—the newest kid on the block—is sharply different from forerunners such as Facebook and MySpace. Source: Working Knowledge
If you have the opportunity and funding to go to off-campus Drupal training, the Lullabot "Do it With Drupal" conference is excellent.
Do It With Drupal 2009 will be held December 9th, 10th, and 11th at the New Orleans Marriot at the edge of French Quarter in New Orleans, Louisiana. Registrations open on Monday at 12:00pm Eastern and the first 25 registrations will get a special deal.
Find out more information about Do It With Drupal 2009 at DoItWithDrupal.com. And if you'd like to get a taste of last year's event, you can still purchase access to the 2008 video archive, 34 sessions and over 40 hours of Drupal and site-building videos, right at your fingertips.