I want to know how to play WOW2 online once I get the PSP version. I don't have a wireless router. Is this necessary? I heard of a usb thing you can plug into your laptop to play the DS wirelessly. Is there something like this for the PSP too? or will I just need to get a wireless one?

Thanks!

You will need wireless. A wireless router would be the easiest but certain USB wi-fi devices or cardbus cards can act as a wireless access point with the right software.