The Ledger has an extensive article on the career of Ray Harryhausen and highlights the recently published The Art of Ray Harryhausen book. Senior VFX Supervisor Dennis Muren, George Lucas and others comment on Harryhausen's influence in cinema.
There is also mention of the Sci-Fi Boys DVD, which features Ray Harryhausen and Dennis Muren, which was reviewed at IGN. You can read more here:
American Heritage published an article on the 29th Anniversary of Star Wars about its impact: