The KDM code for KDE SC 4.7 has just gained one small but noteworthy feature: GRUB2 support. While the KDE Display Manager gaining support for the GRUB2 boot-loader may seem nonchalant, it's actually quite useful. Now from the KDE Display Manager, users are able to select another GRUB boot entry without affecting the default choice or having to wait for the boot-loader to appear when rebooting...
This is one definitely cool feature to have as it'll make it much easier to switch OS's without always going thru the grub2 menu by simply logging out of your session and selecting a grub2 entry and off you go!
Got to admit this one took me a bit by surprise. You could do this with Grub .97 for so long that I assumed that grub 2 and kdm would of had this a long time ago.
Its not the KCM, its not really editing the confi file, it's just "reboot on windows the next time, keep the default for all other". Sure the Grub KDE KCM module still exist (well, its not the same, but one exist), but this is an other thing.