Many people are "worried" that as Google hasn't yet published a Tasks API, then changes to Tasks could break geetasks. Google's reticence irritates me, but I can understand their position too. In any case, I did find that at http://code.google.com/p/gdata-issues/issues/detail?id=987, the very first comment reads in part:
"An api to manage the task list available in the gMail interface."
Now, I did try to look through the APIs, but I couldn't find anything like what that comment suggests.
I don't know if the geetask developers are aware of this so I thought I'd share. If they have any comments, I'd love to hear 'em.
Thanks for a really good piece of software.
Fil Salustri