A little advice to the developers
I find that tiki sites can often be slow unless you have one kick ass server, hehehe. For example this server has a dog and we all know why. Tikiwiki intro advice is to kick your php memory at minimum of 32K!
I posted part of this in another thread, but wanted to make it a thread in itself.
There's a smart ways of having the dynamic capabilities that you presently have without killing the poor servers. As way of example, consider why computer programs are compiled. You might want to compile all the vast tags and such that the poor tikiwiki engine has to interpret on the fly. So whenever someone creates or edits a wiki page it would then be compiled. So the people visiting the site fetch the compiled version. I'm sure most of you have misunderstood what I'm trying to say, but I don't have much time.
Oh, and another trick, you should have development files and live files! For example, just the css file for tikimedia theme takes up 38K, but when you strip out all the comments you get 28K! It is a piece of cake to have a script strip out the comments. It's just common sense. In programming it's the little things that add up.
good luck amigos!
YT