Since Toodledo uses ical import/export. I guess it would be possible to sync with Lotus Notes. I use eProductivity for Lotus Notes and keep my Errands, @Online,@Phone, @HOme tasks in Toodledo (because I am not likely to switch on my computer just to access these tasks. So far it works quite well. Those who do not have eProductivity, can directly use Lotus Notes todos.