I just found out today that main development by the original authors of HTMLArea has been discontinued. See the bottom of the Dynarch project page for some more details, reproduced here:
Update, March 8 2005. Some time ago, InteractiveTools expressed the will to take over the project. We provided some fixes that we made and were not in the CVS version and a RC2 was released at htmlarea.com; however, soon thereafter InteractiveTools announced the project closed and forums discontinued. Bang!
Our position on this is that the editor will keep going; we are actually making quite some progress in its development, but only in house at this time. We are still planning to release version 3.0, quite possible under a different name (so it might actually be a 1.0) but still free, at least for the core editor--some plugins might be released under a commercial license. We can't provide explicit deadlines, so please bear with us.