Hi Fernando, thanks for stopping by again.
Thanks! That's our goal!
We may see things differently here. We have been working quite hard. We recently freshened up our UI and launched a new view called "Today". So it sure feels like we have been busy. But I understand that we may not have gotten to the items you mentioned above.
While all of those items are on our list, and I can't say for sure when we will get them done. The today view will be handy for you when completed (very soon). Right now it just allows you to drag tasks to it that you want to do today. In the very near future, it will also display any tasks that are due today or have been scheduled for "today" as a start date. While not the calendar integration you are asking for, it will help you easily scan for things that need to be done today.
Thanks for checking us out again and sorry to not have a better answer for you at this time.