Alright. Here's the deal.
Fuel cut is a ECU set cut depending on air density. Colder air is denser than hot air, which is why you hit the cut more at night than you do during the day. In order to prevent this, you may want to order JoeP's FCD (Fuel Cut Defender). I do not have one in my car, as I've just learned how to drive around it a bit. I hit it occasionally but it's just part of the car. This fuel cut is the massive "hit" you feel when you're accellerating quickly and the car feels like the motor just feel out for a second. Let off the gas and go at it again, just not so hard. You should be fine.
Detonation again will not be heard in most cases, nor will it be felt. I just check my plugs every other week to make sure they're not getting toasted but others (LinuxRacr & I can't think of the other Mp3 owner--TurboMatty maybe? I dunno) have a J&S Safeguard unit which monitors detonation and automatically retards the engine should detonation occur. Search around for "J&S" and you should find out more about it.