I was looking for a quick and easy way to import my existing Google Task lists into Remember the Milk today and found that, while fairly easy, you need to jump through a couple small hoops.
First off, Google Calendar and Gmail offer different functionality for Tasks. Originally, I was going to use the "print tasks" action and just copy-paste into an email that I'd send to RTM, but there's an easier way. I usually deal with tasks exclusively through the Calendar and so, initially, I didn't see that they offer an "Email Tasks" Action. You have to access Tasks via Gmail in order to see this action. Basically, you just use your RTM import email address and send the tasks to it. Done.
One thing to note here is that RTM doesn't support subtasks, so if you have any hierarchy built into your Google task list, it will be lost. If you need to keep these "buckets" alive, I'd suggest tagging your subtasks before sending them over. Just check out the smart add options for details - http://www.rememberthemilk.com/services/smartadd/
~Mike
