When using Slidescreen as my home screen, I have to manually enter the sim pin after each reboot; i.e. the phone does not ask me for it after rebooting, I have to go to settings, security, and disable the sim pin lock and reenable it to unlock the sim card. My phone is a Samsung Galaxy S (I9000).
nope... while the stock home screen asks for the pin number right after rebooting, under slidescreen I have to manually enter the pin number. the only way to enter it manually is to change the sim card settings, so that it doesn't require a sim pin anymore. changing this setting unlocks the sim card. then after this, I change it back to "require sim pin", since this is a useful security feature.