BenefitsLink - Provides information and services for employers sponsoring employee benefit plans, companies providing products and services for plans, and participating employees.
Most companies allow only one fund family, and a couple of funds within the family.
It's like free money. Don't put too much of it in your company's stock - you're already very dependent on the company for your job. Remember that you will be heavily penalized if you withdraw your money from the plan before turning 59.5, so don't contribute money you might need anytime soon. Dow Nasdaq InvestorGuide has recently developed a new educational section for investors. Beginner or expert, there's information for investors of all experience levels.