Sony already announced the Sony PS3 accessories in Japan about 2 weeks ago. Now Sony also announces the pricing for the Sixaxis controller, PS3/PS2 memory card adapter and BD remote in the United States.

The controversial Sixaxis controller will sell for $49.99. For $24.99 you can purchase the BD remote control.
If you want to use the PS2 memory cards on the Sony PS3 you can buy the PS3 memory card adapter for $14.99.
There are also popping up Sony PS3 accessories from other vendors. Monster cable offers a digital audio cable for the PS3, a component cable and a HDMI Cable.

More details in this Sony press-release.