There are a number of nice HPF texts and free tutorials on the web: search for HPF or High Performance Fortran. The HPF web site is at http://www.nasoftware.co.uk/. There is also an HPF newsgroup, hpff@cs.rice.edu, which provides a forum for HPF discussion and questions.
These sites will also be helpful if you are not familiar with Fortran90 (whether or not you know older versions of the language). There are also many Fortran90-oriented sites; browse using Fortran or Fortran90 as the key.