If you check out
http://sysdev.org.uk it's all been moved to a trac system.
Working towards a release that'll be in both SVN and rar download when done.
Placed a few of the functions into the wiki,
http://sysdev.org.uk/trac/wiki/Functions
If you take a look at the cache functions, most of the site will revolve around them (reducing the sql queries and the processing loops).
The database is being split between fixed length tables and variable length tables, with fixed length being prefered. This should lead to less table locking and speed up everything to do with the database. If you look at the blog, there's some *VERY* preliminary speed tests consucted on lighttpd/fast-cgi.