things to know about portal: 1. the companion cube is your best friend, love it forever. 2. the cake is (not) a lie. [it wasn't.] 3. GLaDOS was killed by Chell. 4. GLaDOS is NOT always evil. 5. GLaDOS is the computer made from Coraline's brain [coraline=wife of cave johnson, founder of aperture science.] 6. Aperture Science is a company for science innovations.
if you have ANY chat client like msn/skype/icq/aol or so, tell me and i'll tell you the whole story of portal 1 so you'll enjoy portal 2 even more.
EDIT: official portal website: http://thinkwithportals.com/