PopCap Games, a casual games company announced Bejeweled for the Apple iPhone.

The game is an online game for the Safari browser on the iPhone.
PopCap customized Bejeweled to leverage the Web 2.0 capabilities of Safari and the wireless capabilities of the iPhone, and has been optimized to take advantage of the iPhone's unique display and input controls.
"We're excited to be providing the most popular puzzle game of the 21st century to users of the most advanced mobile device yet created," said Andrew Stein, Director of Mobile Platforms at PopCap.

You can play Bejeweled for the iPhone for free on the PopCap site.

This is not the first online game for the iPhone. Macmost has a list of games optimized for the iPhone browser.

When Apple will support native iPhone games is not clear. Apple needs first fully support an API for the iPhone.