TODO list in Google Calendar

I spent a long time searching for ToDo service sheets online and all the options I found were either unreliable or, as a bonus, provided more cloud of unnecessary lotions.
I actually stopped on Google Notebook (although it is not a TODO list, but using it is quite convenient).
Here is a UserJs script that allows you to embed a small ToDo list in Google Calendar (unfortunately it works only under FireFox)

Quite functional, but nevertheless convenient.
Installation: if there is no Greasemonkey install from here , install the script itself