Hi,
TotallyMax already answered this correctly on another thread. It will be normal that some time lag will exist between Kubuntu and LMCE release, cause many times it's not just a matter of recompile, but also some new features, bug hunting etc....
But AFAIK, there will be simple procedure (or even automatic way) to upgrade (at least LMCE part will be) - not sure about Kubuntu... Right now LMCE is in very early stage, where source code repository is about to be setup, so time lag will be a bit longer. Guys are working hard on this one...
Have patience and contribute whereever you can...
Thanks in advance,
regards,
Bulek.