Actually, the main reason for the change is because the old layout had many problems. Some of you might have noticed that it took a really long time for the pages to load, the page navigations did not show all the layouts, and some of the features did not work properly. I also changed the layout because I was tired of the dark look
This year we will start posting tutorials to edit your own plurk layouts (in the near future) so if you have a tutorial you want to suggest, send it to us by email. We will also start publishing more custom-made layouts! Some of the custom made layouts that I will be posting will be layouts that I originally designed for Plurk Layouts, but unfortunately they cannot host free layouts anymore (see their article why).