[bestest]

Well, frankly, it looks like you're jumping from one sheep to another. Using deferreds does NOT make more sense, and is actually even more difficult to perceive as it's quite counter-intuitive. MVVM is the way to go for web apps. Actually, anything else would be better than this.

The methods and approaches jQuery provides should not be used as a mainframe to achieve your goal, they should only be used as helpers here and there if ever.

[lucian1900]

The deferred monad is pretty much the standard way to deal with this problem and it composes nicely. Have a look at Twisted's.