Just found by accident: http://demos.telerik.com/aspnet-ajax/editor/examples/overview/defaultcs.aspx
Wow, wow, wow!!! Image resizing: no problem (in any browser)! The whole editor is a pure pleasure to work with! So the code is available and working. Since the aspnet editor and the kendoui editor are both based on working in a browser, it frustrates me a bit to see how much they differ and why "we" can't have such a great working editor.