The development of two promising Open Source browser-based WYSIWYG XML editors come to the next round:

Giuseppe Bonelli is looking for developers joining him to (re-)start development [1] of the Xopus [2] Open Source version. This is a WYSIWYG XML editor based on MS Internet Explorer.

I am awaiting a profound rewrite of Bitfluxeditor [3], a Mozilla-based WYSIWYG XML editor, which hopefully might happen in the foreseeable future. This rewrite is called BXE-NG (Bitfluxeditor Next Generation) and might be based on Mozile [4]. See the threads in the BXE mailinglist for more infos. [5].

[1] http://groups.yahoo.com/group/xopus/message/380
[2] http://xopus.org
[3] http://www.bitfluxeditor.org/
[4] http://www.zzoss.com/weblog/index.php?m=200304#48
[5] http://lists.bitflux.ch/pipermail/bx-editor-dev/2003-February/thread.html