HELP :Blackberry and handheld device web content

[phpuser_2000]

Hi,
Does anyone know what form of RSS is used by blackberry and handheld devices?

And also how can iI use php to deliver web content to blackberry handheld devices?

I woudl really appreciate it any good links, example and tutorials and samples.

I came accros WML, does blackberry use it to display webcontents?

Thanks