I hope Franklin doesn't get mad at me for posting this right after he did, I swear I meant to post this last night after I read about it but I got distracted and forgot! I remembered after seeing the link on his site.
Anyway, here's the Science Fiction Book Club's list of the Top 50 Science Fiction and Fantasy books, of which, I am ashamed to say, I have read a grand total of seven. I lose more geek credibility every day. How many have you read?