"Out of the Box" functionality for Handheld Devices?

I'm trying to learn as much as I can about MI. The SDN network has been a great place to start including the forums and blogs.

What I would like to know is what applications are available for habdheld devices after installation without configuration changes? Our company will be moving from 4.6C to mySAP 2005 next year.

My main 2 items of interest are:

1)Time and Travel. I've been reading that it is available only via a laptop. Is this true, or is it accessible on a PDA also? I could have sworn I read an article in the past about it being accessible via a PDA, but that might have been a 3rd party product.

2) CRM - Opportunity Management. I also read some snippets about having a small database installed on a laptop to run this. Can opportunities be updated directly from a PDA/Blackberry?

If anyone has a listing of other out of the box transactions available on handheld devices, I'd apprecitate it.

Thanks,

Jonathan