I signed on earlier today. No problems what so ever and my avatar even migrated over.
I'm also still learning but so far, I see some very nice things about the new format.
When I saw that you would be using email to send a link to re-register, I was a little worried. Fortunately, I had a valid email address. I am on my sixth ISP with corresponding email since I first joined the board and hoped that I had updated to a current email. Luckily, I had, and things went very smoothly.