If you were looking to register for this year’s Google I/O today, you will have to wait until next week. Originally scheduled for today, Google has pushed it until April 15th – April 18th.
According to a post on Google+, they are making the registration process easier. That is always a good thing right? It will still work just like previously explained. Applicants will have 3 days to enter their registration, and there will be a random drawing shortly after the registration closes. Applicants will also get an email notifying them if they won.
source: +Google Developers