It's funny, the first time I heard this, I thought it was a really neat thing to say. It's like wishing somebody a good day, weekend, evening, whatever, not worrying too much about the specifics. The kind of laziness that seems more sincere.

Now it's become just another greeting, part of our business culture. The fact that it's probably in some ESL textbook kind of kills the intent. Probably a sign that I'm getting old.

Anybody know what the young people are saying to each other nowadays? Aside from racist, homophobic slurs, I mean.

thanks for clarifying this. Being new to the US, I initially found it slightly strange when people would say that; but I've come to love the warmth and politeness that comes with it. Also, saying "Have a great weekend" usually makes the other person's face light up with happiness :)