Is there any app out there that allows you to password protect certain applications? I had an iPhone before this (jailbroken of course) and used biteSMS which included a setting to require a passkey to open it. There was also a program that would require a password/passkey to open any application you specified. That would be perfect for this phone because I constantly have people asking to check out my phone, but I do not want them going through all my text messages or photos. Any ideas?