Yes this is exactly what I was saying. Therefore conserving power while still giving you the speed when you need it. Saves you going to the menu a switching it on before browsing the web or watching youtube.
(Settings Page)
------------------
OPTIONS:
Enable 3G: ON | OFF | WHEN USING APPS THAT USE THE WEB | SELECTIVE APPS
SELECTIVE APPS:
SAFARI: ON | OFF
YOUTUBE: ON | OFF
MAIL: ON | OFF
--------------------
Andrew