Here is a short update on where everything is: (updated 8th Oct)
iSitters volume control on the parent end is not working in iOS7 (you have to use the device hardware buttons), i cannot find a work around so for now it will be removed. **update now in store**
Some downloads are failing (typically with a 404). An update to fix this is expected to pass app review tomorrow (4th). **update now in store**
Password protected podcasts are not working. Update to fix expected to pass app review early next week.
Opening the app will sometimes be met with a black screen, you will need to kill the app from the multitasking to restart it. I am still researching this problem.