What can I do to prevent write-write conflicts on a wiki-style website?

Question

On a wiki-style website, what can I do to prevent or mitigate write-write conflicts while still allowing the site to run quickly and keeping the site easy to use?

The pr

Answer 1

In Gmail, if we are writing a reply to a mail and someone else sends a reply while we are still typing it, a popup appears indicating that there is a new update and the update itself appears as another post without a page reload. This approach would suit your needs and if you can use Ajax to show the exact post with a link to diff of what was just updated while User B is still busy typing his entry that would be great.