Jim Stroud recently published a comprehensive list of over 200 company/industry research resources on his blog. Sometimes a list like that is much more useful than simply searching through Google.

Speaking of good resources, your first port of call for company/industry research should always be your university library. The excellent, extensive, expensive, and chosen-by-research-professionals set of resources that is maintained there is truly invaluable. And as a university student, you usually have access to all of those resources for free.