The Plants Vs. Zombies iPhone game generated $1m in the first 9 days

"PopCap, which also makes "Bejeweled," said PvZ is the fastest-selling game in the company's history, with totals "in the millions of units" across all platforms. PopCap was mum on specific sales figures, but did disclose that when the PvZ iPhone app debuted in February, it sold 300,000 copies to rake in $1 million in just nine days, setting an App Store record at the time. Last week, the game was still No. 20 in the iPhone App Store. The iPad PvZ app was, and still is, featured on iPad demo units in all 300 of Apple's retail stores, said PopCap VP-Marketing Ben Rotholtz."
Source:  AdAge, 6th September 2010