Here's where I must not have been clear in my last post:

1. There's no mystery is Joshua 2. The spies went to see Rahab because they wanted to have sex while they were on a mission from God.
   
2. Reading Joshua 2 in this light would give an entirely new meaning to the wheeling and dealing that the spies did with Rahab. She uses the information to blackmail them, and they essentially beg her to keep their 'secret' when they come back to invade (i.e., don't tell anyone what we did).
3. If you are familiar with the traditional interpretation of the passage, you will probably balk at the idea that the 'secret' might be about sex, however (a) the spies were already safe from the angry citizens of Jericho when they made the deal with Rahab, so (b) the 'secret' they want her to keep doesn't seem like it would be that they are hiding; it could instead be the embarrassing fact that they've had sex with a prostitute and non-Israelite.
   
4. I was wondering why no commentators talk about this, because it seems CENTRAL to the interpretation of the passage.

I have to go, the cat just barfed on the bathroom rug. It's a glamorous life I live.