Palm's miniscule and wallet-friendly Centro has managed to reach one million units sold since its launch last September. It got its legs working as Sprint and AT&T's gateway smartphone at that fantastic $99 pricepoint, and now it's making a bid for world domination in major markets in Europe and Asia. The one million sales have it nipping at the heels of recent superstar smartphones, the two million plus HTC Touch and the four million plus iPhone, not bad company in the least.