My two cents:
1) If you consolidate, you can lock in a fixed rate that (might) be lower than the variable interest rate you are currently paying on a number of different loans.
2) Student Loan interest is deductible on your taxes for incomes up to 50K a year (single filer) up to $2500 (per 2006 taxes). Ergo, interest for a Student Loan is "better" than interest for a car loan or credit card, per se.
3) There are different pay-back options for federal loans (Regular, Graduated, Extended). Particularly with a larger, consolidated balance, you can stretch these out for up to 25 years. You pay more in interest, but you can live a little. And again, interest is deductible.
4) For many student loan lenders, you can decrease your interest rate by making a) consistent on-time payments over a certain period of time and b) using THEIR automatic pay system. Know your benefit eligibilities, it'll save you money.
5) Certain occupations with certain contingencies are eligible for student loan forgiveness, eg teaching in a federally designated teacher shortage area.
6) Certain occupations/conditions are eligible deferrments for a period of time (e.g. Peace Corps, graduate school, tax-exempt orgs, etc). If eligible and you still want to make payments, you can pay down the overall principal without incurring interest. I had a full time job and the company was paying for a master's degree for me. I took 6 credit hours a semester and was able to defer my student loan interest during this period.
Most of this information pertains to federal student loans, regulations for private loans varies greatly. Always contact your lender to find out what you might you qualify for.
And, one more cent: if you have any debt out there with a higher interest rate than your Student Loans, pay that off first.