Hi guys. I upgraded from JB 1.1.4 to the official unbroken 2.1 this last weekend. Glad i did too as the userbility is now pretty awesome. I'm happy paying for the official firmwares and dont plan on jailbreaking my system again. But before i upgraded i had this message posted in a previous thread.... my question is... what is Cydia, winterboard, saurik and MobileSubstrate? are these just JB elements?