Changing domains was a big decision. My biggest concern was being able to keep my user, RSS feed, and search engine traffic. Luckily, the power of the .htaccess file allowed me to do so:
Options +FollowSymLinks RewriteEngine on RewriteRule (.*) http://yournewdomain.com/$1 [R=301,L]
The above .htaccess file code, placed on the old domain, redirects the user to the same URL on the different domain.
Quick, easy, and functional.
MooTools has always gotten a bit of grief for not inherently using and standardizing namespaced-based JavaScript classes like the Dojo Toolkit does. Many developers create their classes as globals which is generally frowned up. I mostly disagree with that stance, but each to their own. In any event...
I recently posted an awesome (if I may say so myself) CSS3 / MooTools tutorials called Create a Photo Stack Effect with Pure CSS Animations or MooTools. The post presented two ways, a pure CSS method or MooTools-powered class, to duplicate Google+'s elegant photo stack...
In case you weren't aware, CSS animations are awesome. They're smooth, less taxing than JavaScript, and are the future of node animation within browsers. Dojo's mobile solution, dojox.mobile, uses CSS animations instead of JavaScript to lighten the application's JavaScript footprint. One of my favorite effects...
The idea of image preloading has been around since the dawn of the internet. When we didn't have all the fancy stuff we use now, we were forced to use ugly mouseover images to show dynamism. I don't think you were declared an official...
One more note. I recommend keeping your old domain for at least a year. Make sure to give users and search engines time to update.