Haha, I discovered this site a few weeks ago. There's a lot of funny things in it. You can end up wasting a lot of your time though. I remember one guy even said something like "Today, my friend introduced me to this website and I just realized I've been on it for the last 12 hours. FML."
Some good recent ones:
"Today, my fiancee broke up with me. Via a myspace message. While we were in the same apartment. FML"
"Today, my boyfriend told me he couldn't hang out with me because he felt really sick. I went to his house anyway to surprise him with homemade soup. I walk in to his room only to find him hooking up with my sister. She can't drive, our mom drove her there. FML"
"Today, I forgot to do my French homework, but since it was an online worksheet, I told my teacher my internet wasn't working. I told her with an e-mail. FML"