Some people tend to suddenly dissapear from the internet. I remember another girl that I chatted with a couple times per week, until she was suddenly gone. Sometimes I'm afraid that those people died...
When I look at my MSN list, I see that 90% of the people are never online anymore. It could be that they all have me blocked of course (

), but I still find it weird...
But I could imagine that you suddenly don't like internet contacts anymore.