I'm not sure if they had to do it twice. I have a feeling that Lord of the Rings may have only won it because the films were out at the time.
I'm not sure if I'll read all 200 either...I mean, there's an awful lot of Jacqueline Wilson on it which I doubt I'll bother with (but if they fall into my lap I might in the end). I'm in no rush anyway. I remember when I first started it I was a bit obsessed and I kept starting multiple books at once because there were so many I wanted to read RIGHT NOW. I have since slowed down though I certainly won't be tackling War and Peace whilst I'm busy with uni.
I've got so much out of doing it though. I've always loved reading, but I was in a bit of a rut with the type of books I was concentrating on (lots of Terry Pratchett, Bronte and Austin), so working through this list has really opened my mind to other genres and authors. Making myself try books I wouldn't normally be interested in has meant I've discovered quite a few new favourites. For example, I always hated sci-fi, but I found I loved Day of the Triffids and I've read a few more John Wyndem books as a result. The same with romance....not my genre, but I loved Katherine and Gone With the Wind (not so much for the romance in it though).
I've read 117 so far (I was already on 50 when I started) .