OK, the website is set up ready to go. Here's the details you need...
Address is
http://pbem.fireladder.net/turns.php
Everyone has a username as specified in Brian's intro email. Password for everyone is "password". I'll add a player profile page shortly where you can change this.
The system is simple enough to use. When you visit the page, it will say if it's your turn or not. If it isn't your turn, you can't do a lot on the page.
When it is your turn, some text fields will appear.
Comments for everyone - if you want to post some notes on your turn, this is the place for it. Everyone will get an email sent to them.
Comments for Allies - If you want to enter strategic notes for your allies, enter them here. You need to select your allies each turn using the checkboxes next to everyone's name (given that allies can change at a moments notice).
Comments for next player - These will be included in the email containing the save file when it is sent to the next player.
Attachment - The whole point of this exercise. You must BROWSE into your civ saves folder, and locate the save file. Don't bother renaming it, this is done for you.
When you hit the send button, it will upload your save to the server - this can take a minute or so, depending on file size. Once your save is uploaded, it will send out the emails to everyone, and update the turn counter.
I mentioned above that the site is Beta, ie it still has bugs in it that I need to identify and fix. If the site does jam up while you are sending, please send me an email or msn (address in BK's email) and let me know. It might be a bit erratic for the first few turns, then it should be smooth sailing. It might be worth posting your comments here for the first few turns as well.
Sadu.