A few weeks ago ztomi had a tutorial about ADB wireless. You propably already have your favourite way of rooting your phone (superoneclick etc), but what if you don't want or can't use the usb port of your phone?
Sometimes you don't want to store any data on the sd card, but you have to, because your apps resources would take up too much space int the internal memory.
Here is a method on how to store your data securely.
As far as I know there is no public API for interrupting/ending a call. You can detect calls and the states of calls, maybe even prevent an outgoing call, but there is no API for ending an ongoing call.
This must be a security issue, but I also met the need of this feature, and only was able to do some workaround: turning on airplane mode interrupts all wireless connections including phone calls.