Sweetspot.ca has a great section in their website called 'getting dressed' - it is a bit like polyvore in that it displays outfit combinations... but focuses on what is 'appropriate' for specific occasions.
Someone like me, who makes social faux pas everytime she turns around, can REALLY benefit from something like this...
a few examples... (who knew you could be fun at a cocktail party? textured bag? yes please!)
i'm attending a wedding for complete strangers at the end of July, so this was PERFECT for knowing what was acceptable. check it.