Hi all: I really like tinyMCE, because is very powerful. I'd like to see some plugin for that. On the otherside, if what you need is to install an editor very quickly, I think, you can use this plugin for w2p: http://dev.s-cubism.com/plugin_elrte_widget It use elRTE (http://elrte.org/) editor. Maybe you can spend some time trying to integrate in your code.
HTH! Bye