Hi. I made for my personal use a widget for Symbian s60v5 and s60v3 phones. It's available here:

http://zeromega.altervista.org/blog/2011/09/remember-the-milk-widget-per-symbian-s60/

The page is in italian but a multi-language translation tool is on top of the page.
Please let me know if you think it's useful, any feedback is welcome!