You've got to be kidding; WiFi always on and u get 24 hours? How do u have the WiFi power setting set: Shut down when screen turns off, never when plugged in, or never? Do u keep your data (3G) connection always on too?
I keep wifi on all the time, i keep 3g off. and I keep wifi power to never turn off. the extended battery is no joke i kid you not. Its well worth the price of admission.