Will Time Capsule work on a college dorm's WiFi network?
She could probably tie the time capsule into a ethernet line in her dorm (I assume there is a wired option) and then set the time capsule to be on bridge mode (where it doesn't issue a new IP adress but rather passes the one issued by the school's DHCP).

She could then use her Time Capsule (which is also a wifi router) to have her own private wifi locked down for her dorm, this is what I do in my house as Telus doesn't offer DSL modems as a standalone.