Confusion concerning notebooks

I am trying to help someone purchase a notebook and am mystified by some things and am begining to discover just how different notebooks are from desktops. Here are my questions, not in any particular order:

1. Which of the notebooks have bluetooth built-in as an option? (not the usb-bluetooth thing). For example, I cannot find it when configuring the Lat-100L, but I can with the Lat-D505.

2. As I asked elsegroup, what the heck is an SWDVD? Some sort of software driven dvd?

3. Why do they have "wireless router" and a "wireless broadband router" as two separate sections?

4. Why am I sometimes offered the chance to buy an intel wireless mini-PCI card and other times only allowed to get Dell branded cards?

5. I'm buttuming that mini-PCI cards are buried within the system. There are is no external access to a mini-PCI bus, is there? (I'm a desktop guy).

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