Campus Travel
Based in the UK, this student travel agency offers informatin on transportation, visas, health. Remember that prices  are in pounds and visa requirements are for UK residents.

Council Travel
Not only online information but also agencies located near several campuses.  They sell the ISIC card, railpasses, and offer student and teacher discounts. They even sell travel gear.

Kilroy Travel
Specialists in travel to and from Northern Europe.

Prism Travel
Railpasses, student ID cards and airfare quotes are just a few of the services they offer.

STA
They started a agency in Australia especially for students and now have offices worldwide usually near university campuses.  They can help with all of you student travel needs.

Haggis Backpackers
3 and 6 day tours of Scotland that allow participants to jump on and of the van at your leisure.  Looks like a nice way to see the countryside without being rushed.