Since I did not partisipate on last year on MS Ignite. My company is sending 2 persons this year. It's my Co-worker Ivar Naggum and my self.
Most of the stuff that I will look into this year at Ignite will be about O365, some Skype for Business Online and Azure.
There will come lots of bloggs and tweets from this years event.
You can read about Ignite here
I hope to see you at Ignite in Orlando.