@Ian2: I tried to do mine on my WP7 as well; the page was cut off just as you described. I had to find just the right spot to scroll stuff over so I could click buttons and fill out fields ... then something happened and the page just refreshed and said it was expired ... had to start over and lost my place. Missed the early bird, but I did manage to register.
Unfortunately, management has decided *not* to pay for it so I'm on my own.
I have a baby coming in October, so if there's any complications or difficulties I won't be able to go, but I am going to try my best.