I need to find a way to look up my w2's that were filed last year to file for financial aid for school

You should have copies of your W2's in your files. If not - you can get what's called a "transcript" of your 2007 taxes from the IRS for free, which will include information about your income. The transcript is acceptable for most purposes like this. See:
Need a Copy of Your Tax Return Information? (http://www.irs.gov/individuals/article/0,,id=110571,00.html)

But if the school insists on an actual W2, and you don't have a copy in your files, then you will have to contact your employers for duplicates.