just had my 20k service performed, as well. The Porsche network must be pretty thorough, as I had the same little tech bulletins (exhaust washers, conv top tool, etc) pop up and get performed as well. I am still waiting on parts for 3 or so small bulletins, however they are extremely minor (bolts, washers, etc - unbelievable
My grand total: $570.00. I already have new tires on the car at 19,4XX miles.