I realized that I really need a calendar integrated in my email client (Thunderbird), and unfortunately the *great* vim + some shell script in cron are not enough... :-)
It's a couple of weeks that I'm using lightning with a cool extension called Provider for Google Calendar, that allows a bi-directional access (r/w) to google calendar directly from Thunderbird. I've also enabled the SMS notification (free) and honestly I have to admin that it's simply great! Now I can read my events, tasks, TODOs, etc. everywhere using a web browser or by my email client and receive alarms and notifications in my phone.