I just got SiriToggles from the BigBoss repo for free and it totally adds a lot more functionality to Siri. You can ask Siri to set brightness to a certain percentage, enable/disable wifi, bluetooth, airplane mode etc. also tell Siri to launch apps for you. I'm reFalling in love with Siri. 
Sent from my iPhone4(S) iCafe

Sent from my iPhone4(S) iCafe