User's Informational Page - What information should we collect?

One of my first orders of business is to update what user information is collected and displayed in the user profile. Of course all information will be optional. Some categories I came up with are

  • Full Name
  • Personal Website
  • Instant Messaging Accounts
  • E-mail (for public display)
  • Address (at least City, State, Country)
  • Certifications Obtained
  • Certifications currently studying
  • Company
  • What about another section for "Resume/Work experience", ala LinkedIn? Opininons. ideas?