Test if you can, on real hardware if possible, in virtual machines if not.
Kubuntu Desktop amd64 testcases in Artful Daily:
The label "Daily" will change once the Alpha 2 has been milestoned. Remember to report bugs and link them on the qa site. The easy way to file bugs is in the commandline: ubuntu-bug packagename. Ask us in IRC (#kubuntu-devel) if you need a package name.
Kubuntu Desktop i386 testcases in Artful Daily:
It is so important to get this preliminary testing done if we want a 32-bit Alpha 2 ISO! We could not do an alpha 1 of Artful for this reason.
PS: sorry for the late notice; I'm currently in Spain at KDE Akademy. You can subscribe to get the testing notices directly: http://iso.qa.ubuntu.com/qatracker/subscription