Lion DiskMaker has a beta for creating a Mavericks GM disk. It should be updated soon to support the release. You just download the installer from the App Store and run Lion DiskMaker.
sudo "/Applications/Install OS X Mavericks.app/Contents/Resources/createinstallmedia" --volume /Volumes/Mavericks/ --applicationpath "/Applications/Install OS X Mavericks.app"
Note the double hyphens before the keywords. The quotes just make it easier to read.
sudo /Applications/Install\ OS\ X\ Mavericks.app/Contents/Resources/createinstallmedia –volume /Volumes/WHATEVER_DISK –applicationpath /Applications/Install\ OS\ X\ Mavericks.app –nointeraction