Ok, the first request shouldn't be too hard compared to other challenges you've taken on. One of the biggest weaknesses of Google Tasks is lack of undo support. Add this and I will use the iPhone version full time - the web version will be little more than a backup in case something goes wrong with the iPhone or I just don't have it on me.
The second request is way more out there, and you may well see it as outside the scope of this app. But you've consistently exceded my expectations so far, so I'll put it to you as a challenge. ;) I'd like to be able to synchronize my Google Tasks list with an OmniOutliner file. That's one alternative that I actually would prefer to use on the desktop. No need to deal with formatting and stuff. But being able to use the OO interface to edit Google Tasks would be a beautiful, beautiful dream.
Thanks again for the amazing product!
Jesse