Here is how you can get the prices of the simple products. The example is for a single configurable product but you can integrate it in your loop.
There may be a problem with performance because there are a lot of foreach
loops but at least you have a place to start. You can optimize later.
//the configurable product id
$productId = 126;
//load the product - this may not be needed if you get the product from a collection with the prices loaded.
$product = Mage::getModel('catalog/product')->load($productId);
//get all configurable attributes
$attributes = $product->getTypeInstance(true)->getConfigurableAttributes($product);
//array to keep the price differences for each attribute value
$pricesByAttributeValues = array();
//base price of the configurable product
$basePrice = $product->getFinalPrice();
//loop through the attributes and get the price adjustments specified in the configurable product admin page
foreach ($attributes as $attribute){
$prices = $attribute->getPrices();
foreach ($prices as $price){
if ($price['is_percent']){ //if the price is specified in percents
$pricesByAttributeValues[$price['value_index']] = (float)$price['pricing_value'] * $basePrice / 100;
}
else { //if the price is absolute value
$pricesByAttributeValues[$price['value_index']] = (float)$price['pricing_value'];
}
}
}
//get all simple products
$simple = $product->getTypeInstance()->getUsedProducts();
//loop through the products
foreach ($simple as $sProduct){
$totalPrice = $basePrice;
//loop through the configurable attributes
foreach ($attributes as $attribute){
//get the value for a specific attribute for a simple product
$value = $sProduct->getData($attribute->getProductAttribute()->getAttributeCode());
//add the price adjustment to the total price of the simple product
if (isset($pricesByAttributeValues[$value])){
$totalPrice += $pricesByAttributeValues[$value];
}
}
//in $totalPrice you should have now the price of the simple product
//do what you want/need with it
}
The code above was tested on CE-1.7.0.2 with the Magento sample data for 1.6.0.0.
I tested on the product Zolof The Rock And Roll Destroyer: LOL Cat T-shirt and it seams to work. I get as results the same prices as I see in the frontend after configuring the product by Size
and Color