Thank you for contacting us!
Let me address your questions one by one:
1. The latest version for our ASP.NET AJAX controls is 2010.2 713
2. The latest version for our Rad Editor for MOSS 2007 is 5.8.0. The difference between the different versions are mostly bug fixes. You can check the release notes for the RadEditor here:
3. The Telerik RadEditor LITE edition is for ASP.NET and it does not work on AJAX, so it uses a different platform than the RadEditor for MOSS, which is for ASP.NET AJAX.
4. When you download the RadEditor, you get a .wsp file
Let me know if you have any further questions and I will be glad to assist you.
the Telerik team
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