Thanks, Makis. I managed to register.
My remarks:
1) Please change the name of a button on the page where you fill in your profile info from "Ŝanĝi" al "Konservi". Now you can think that this button is for changing email but not to save changes in your profile.
2) I could not find how to subscribe to new events by email.
3) As I understand, there is no calendar of Esperanto events in chronological order.
4) How can I change my uzantnomo or to hide it completely? It would be better if uzantnomo is replaced with user name (such as OBAMA Barak, now it looks something like obamabarak). Now both uzantnomo (obamabarak) and normal user name (OBAMA Barak) are displayed on home page and only obamabarak is displayed if he joins an event.

I updated my comparison table http://discoverfuture.blogspot.ru/2014/03/esperant...