I like what you have done with the wiki, I signed up but not use what help I can offer.
I was looking at a comprassion of different costs and thought that some extra txt would be good,
for example I looked at a table and in the last coloum was a link to related infomation,
on the screen in the coloum is just a number and a link, what I was hoping to do is add 'alt' text to the html link, so it would popup a little box with infomation there.
But it looks like it's more low level than a nromal edit and would take a little php tweaking to the wiki, unless there is a special why of doing it.
Also RSS on some of them pages would be nice, would help with mushing it all up.