To satisfy the urgent need of having CKEditor into Drupal, we've just launched the CKEditor module. This is supposed to be the immediate upgrade solution for FCKeditor module users, a well as the current best option for those willing to have this editor into their Drupal sites.
We'll be now working on completing and stabilizing this first release.
Regarding the WYSIWYG module integration, we didn't see much activity in this sense so far. This new module was the fastest way to have the integration ready to be used. As soon as its first version is complete we'll move our focus to the WYSIWYG module, looking for providing CKEditor support on it as well.