I was unable to obtain ckeditor using cvs as follows:
cvs co openacs-4/packages/xowiki/www/resources/ckeditor
Just now, i was trying ckeditor on a fresh installation of OpenACS head with the contained xowiki version. If you have an xowiki version from cvs head, there is no need for an additional checkout, just "cvs update -d" is sufficient. The image selector is not finished (e.g. icon, message keys, etc.), but it is not essential either.
I have not yet looked into newer version of ckedit.