You can grab notes on the currently logged in member by using the PHP function apache_note or the equivilant function in any other programming language you use in your members area.
Check here to see what standard information you can request always.

The values you can fetch if using NATS authentication are:

• sparta_memberid
  
• sparta_firstname
  
• sparta_lastname
• sparta_email
• sparta_country
• sparta_zip
• sparta_state
• sparta_city
• sparta_joined
• sparta_last_login
• sparta_site
• sparta_siteid
• sparta_trial (set if the member is a trial member)