Somewhere in this thread people were asking about how to do a check off list online.
I recently found this website:
It is free. I just signed up, you give a title for a list and enter the items. when you enter a check mark in the box next to an item it moves the item to the bottom with the box checked.
I made one for a wish list for Christmas and was able to put in links to online stores. When someone wanted a wish list I just gave them the address to mine on TaDa List. You can make the list either private or public.
I added the page to my favorites under links, then in the Explorer header I have the Links menu bar showing so my list is right there to check easily.
I plan on adding more lists for to do and to do for Christmas 2009.