How do I fund BTC-e and transfer money there instantly from other exchanges? A few services claim they support sending money to BTC-e, but I haven't actually found the option to do it.

Does anyone know of an instant way to send money to BTC-e or transfer money to BTC-e from another exchange like Mt. Gox?
Currently there is no such option, hence the difference in price you see. Bitinstant used to offer the service I believe, but now it's only offered as a withdrawal option.