I am well, thanks for asking!
Did you look at that checksheet that's attached above? I'm guessing so, since you figured out that your users would have to change from username to email-based login. It's not that bad, though: you can email them to tell them what will happen, and how they will log in after the migration.
I can't tell you that it's not work, because there IS some work for you, but we do the bulk of it, and we're here to help you figure out the rest, and we'll walk you through it.
We have a whole slew of former eve customers that are happily using Hoop.la...and you just can't beat the price right now!