Hi Jared Gaiser,
There is a beta version of RadEditor for MOSS 2010. You can download the free trial version from the Free Trials section of your account in http://www.telerik.com/account/free-trials.aspx.
Regarding the documentation, here is a link for the introduction online help article for RadEditor for MOSS: http://www.telerik.com/help/aspnet-ajax/moss-introduction.html
the Telerik team
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