Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
One of the big visual changes just happened in KDE 4, the transition of kdelibs to the Oxygen Icon set. This transition is still in progress, and it includes a massive icon naming scheme change that affects thousands of files. But, the Oxygen artwork project much is more than just an icon set, it's a unified way to do artwork for KDE 4. SVG an essential part of Oxygen, so many applications that are now capable of SVG display are also using Oxygen styled artwork. Read on for more...
Please keep in mind that the artwork I am showing today is a work in progress, but shows things that have already made their way into KDE's SVN as the new default. Oxygen will be the default art scheme throughout KDE 4, but many of the elements can still use some tweaking. If you have constructive feedback on any of the artwork demonstrated today, the Oxygen team would be happy to hear about it in the comments.
Oxygen is a far reaching project, and extends well beyond icons. They have a sort of unofficial tagline: "a breath of fresh air for your desktop", which encompasses the look and feel of the whole KDE environment.