with the hero i had widgets in the pull down status bar at the top to toggle on/off gps/wireless/sound etc but don't know if i can get the same from the market for 4.0. i found them very useful there rather than cluttering up my homescreen
Widgetzoid 2 should allow this :
https://market.android.com/details?...rch_result#?t=W251bGwsMSwxLDEsImNvbS5qaW0yIl0.