It has been raining all day so the humidity it through the roof, I'm sure. Anyhow, I used the crusting cream cheese icing (from here) and it isn't crusting. I'm stuck waiting now b/c there really isn't anything else i can do until I get my cake full smooth. Is there anything that I can do to encourage it along?

Freeze it

If it's humid and you know it will be while making the icing, next time add more powdered sugar and some meringue powder. For future notice.. the sugar:fat ratio is what causes the icing to crust.. the more the sugar in comparison to fat, the quicker it will crust.

Ok, thanks! I'm off to freeze my cake