That's always an idea. I had my 2G with a cracked screen for over two years. And it kept getting worse and worse. It still worked though. I waited for the 4 to be released and now you can be sure I always know where it is and don't drop it.don't get it replaced right away.....
keep it for a month or two, it will be a daily reminder of your mistake. Trust me brother, I did the same thing & now I am cautious of it. No matter how intoxicated I am, I always make sure it is in my pocket before I let it leave my hand.
Except I had to live with mine for a year because my financial situation wasn't really that great when I had the 2G. Never once have I dropped my 3G or now the 4 (knock on wood)