Not being a computer wizard I've stayed out of this thread, but I think Bruce has put his finger on something. I think that Glen is doing valuable work and if a group collaboration can help I want to be part of it, but I too think that various conflicting requirements are being bounced around.
1. The transcription alphabet. Glen has drawn attention to the neglected topic of infrequent characters and seemingly significant variants of frequent characters. This work depends on the use of a stroke-based transcription: but proposals for collaborative input to a file seem to involve the EVA scheme used by most of us.
2. The master file. If various different individuals are going to input their personal readings of disputed text on a Wiki principle, there is a danger of the master file or master database getting horribly complicated.
I would want to be able to extract a running text using fairly simple scripts much as I can now extract e.g. the Takehashi version of each line. I also do not want to be restricted to custom scripts: I do quite a lot of work with Python scripts of my own devising. I have no strong opinions about XML and its rivals, but please keep it fairly simple.
3. The word divisions. I think that any word division is better than none, but I don't see an easy way to hold variant divisions of a line in a file or database in a way which could be modified collaboratively.