I'm a speedreader, as well. I read three times faster than the average person and I finished Deathly Hallows in around four hours. xD I would've finished earlier if I wasn't so easily distracted...
Pottermore is AWESOME, I signed up for early access but haven't gotten in yet (I'll be in before October though), but I have friends who are already in and I am a Tumblr addict so I'm seeing all the posts about it and it's really something. It's spectacular.