Bruce Webster over at And Still I Persist used that phrase as the title for his post about the death of Arthur C. Clarke. I think that's more fitting than 'rest in peace.' Bruce's tribute is worth reading all the way through.
Regular commenter Maggie linked to this piece that is a very nicely written retrospective of Clarke the author and Clarke the profound influence on others. I think the second piece proves Bruce Webster's points perfectly.
Gaius -
It is quite an eloquent tribute.