According to Apple it sold 1 million iPhone 3Gs in the first weekend of sales.  It also announced 10 million downloads from the App Store, many of which were free.Apple Inc. said Monday it has sold 1 million iPhones in the three days following the release of the latest model on Friday.”IPhone 3G had a stunning opening weekend,” said Steve Jobs, Apple’s chief executive, in a statement Monday.But the launch was plagued by software problems. All the new iPhones had to connect to Apple’s servers for activation,