I agree with Jim that we needn't restrict our answer to exclusively what was asked; to do so would be rather boring. But returning to the OP...
chinamon wrote:I read that the best brew temperature is around 202F but what would be the ideal serving temperature at the cup (immediately after brewing)? I check the temperature at the cup and it was only at 146F.
The temperature in the cup is rather misleading. The cup itself absorbs a significant amount of heat. If you want to measure the approximate in-cup temperature, use a Styrofoam cup held tightly against the grouphead. Those who want more precision use a thermocouple mounted to the bottom of the basket:
From Brew ratio vs brew temperatureThis is about as close to the true exit temperature as you can get. Once you take into consideration the loss of heat as the stream falls into the cup and the cup itself, the 67°C ± 3°C temperature of the drink mentioned by the IENI seems reasonable.
chinamon wrote:If I go by these standards then I guess my Saeco is doing alright since it's an Italian machine but I don't get to be all fancy like the rest of you folks.
Jim's suggestion to stop by a top-notch cafe to learn what you're missing is good advice.