Unfortunately, the official Oxygen website dosen’t exactly have a whole lot of icons up. You can’t look at a complete gallery of the progress they’ve made, unlike with the Tango project.
You can, however, get a sneak peek of things to come at the official KDE development SVN here.
Some of the icons look pretty slick, others… not so much. Obviously, these are not the final results. Note that the current license prohibits distribution until the official release. I guess they’ve got some perfectionists running this thing. ^_^