Guardians of Order has announced that it will be releasing a d20 version of its Silver Age Sentinels RPG in August.  The first version, with mechanics based on Guardians' 'Tri-Stat' system, will be released in July (see 'Superhero RPG from Guardians of Order').  Still to be seen is whether Silver Age Sentinels or Mutants and Masterminds, Green Ronin's d20 superhero RPG (see 'Green Ronin To Publish Superhero RPG'), will be the first d20 release in this genre.  The Green Ronon release is scheduled for 'Fall.'