I spent several hours trying to hook up a WYSIWYG editor back in 2005 or so. It was a nightmare, mostly because I was on a Mac. People were having success with this on Internet Explorer to a degree, although they never looked as clean as I thought they should (reminded me of Word 82, if that even existed then).

That first one you linked to above works really well in my browser (Safari Mac) and looks pretty good too. The second one says it's IE only, and the third one works I guess, but it has 4 rows of icons and buttons. Just overkill for me.

Thanks for the links though - great to see people are making progress with this. It's extremely complicated technically, yet the 'average Joe' posting blogs online is probably dumbfounded when a normal textarea doesn't allow for things like bold and italic. At Humzoo, we use a very small set of basic BBCode-ish tags, but someday I'd love to have something more WYSISYG (as long as it's clean and compatible).