Flash/Flex could be a good choice if you're fairly graphical orientated and can draw the various components you may need to use. I suppose you could borrow or take them from other places, but still.

ColdFusion is a fairly dead technology now, due to its price and the fact it doesn't really offer anything significant above other free alternative languages. Whilst it's easy to learn and use, the licensing costs often make it far less attractive to things like PHP. Very few hosts support ColdFusion, comparitively.