The RTM widget in Google Calendar is a great way to schedule tasks around appointments, but I thought it'd be useful to pull the same trick in reverse and add a Calendar widget to my task list. I selected the Calendar iGoogle gadget, because it has the nicest mini-calendar. It's a bit of a hassle to set up but it works nicely.

You need a browser that supports adding things to pages. There are loads of options, but I use Chrome, and the "personalised web" extension so that's what the instructions are written for. (It also acts as an ad-blocker but I turned that off because it seems a bit harsh on website operators.)

To add Google Calendar to RTM using Chrome's Personalised Web extension:
• Go to Personalised Web's options page
• Create a new rule, matching the URL ^https?://(www.|)rememberthemilk.com/home/
• Paste the following into the "add javascript" box:
document.getElementById('detailsbox').innerHTML += '';
• Go to iGoogle, and if you don't already have the Calendar widget added, add it and return to iGoogle with the Calendar widget visible.
• Configure the calendar to appear how you want it to in RTM.
• Right click anywhere on the calendar and select "open frame in new tab".
• Select the URL in the address bar of the new tab, and copy it to the clipboard.
• Paste the URL into the 'add javascript' box of Personalised Web's options page, in place of the *****.
• Click "save" and refresh Remember The Milk.

The only side-effect is that the redundant 'list' tab above the list details box is hidden for some reason.