I have been able to free up some time recently to dedicate to the re-design of this web site which has brought the development forward considerably. I am still not in a position to give a firm date on the upgrade, other than to say it will be happening soon!
The graphics and style of the new version is completed, and many of the core functions, such as the new search engine and publishing system, are in an advanced state of development. Porting over all of the content from the old system to the new Markdown-based system is still to be done though and it is time consuming, but I would like to have all of the old content carried over before go-live.
I cannot wait to put the initial version live, and to begin work straight away on subsequent revisions, so expect to see a lot of positive changes around here this summer.
Updated 2021 : note that the above post is out-of-date, given this post was originally published in 2006, but is left here for archival purposes.