All you need to know about CSS and textarea form elements :). Read about how-to tweak your textarea using CSS and sometimes a little bit jQuery. Great and complete tutorial thanks for sharing this knowledge!
A really cool progress bar, you can show this loader animation while your other stuff is loaded in the background. Would be great if something like this (with a % counter) was available for file uploads.
Great article about using a database abstraction layer! I like EZ a lot, they have great classes, but more interesting is the discussion about PDO (check the comments). Last time I checked PDO, most of the PDO drivers were in an early development stadium. Now it’s possible to use IBM, postgres,… the big ones like Microsoft SQL and Oracle are still experimental