Here's a list of movies that LOTR cast members are currently or will soon be in (other than ROTK). :-)

Sean Astin
2004: Smile
2004: Slipstream
2004Caught in the Act
2004Marilyn Hotchkiss' Ballroom Dancing and Charm School
2004: Party Wagon
2005< HREF="http://www.imdb.com/title/tt0410751/">Thanks to Gravity
2004: Mark Twain's Greatest Adventure: It's A Matter of Time
2004: Once in A Lifetime: Just Go For It!
2005: +Hercules (TV)
Sean Bean
2004: National Treasure
2005: The Dark
2005: +Flight Plan
Cate Blanchett
2004: The Aviator
2004: Little Fish
2006: Golden Age
Orlando Bloom
2004: Haven
2005: Kingdom of Heaven
2005: Elizabethtown
2005: Pirates of the Caribbean 2
Billy Boyd
2004: Seed of Chucky
2005: On A Clear Day
Marton Csokas
2004: The Great Raid
2005: Kingdom of Heaven
2005: Aeon Flux
Brad Dourif
2004: Brew
2004: The Hazing
2004: Seed of Chucky
Bernard Hill
2004: Wimbledon
Ian Holm
2004: The Aviator
2004: Stranger With Candy
Christopher Lee
2004: The Corpse Bride
2005: The Last Unicorn
2004: May Day
2005: Charlie and the Chocolate Factory
2005: Star Wars: Episode III
2006: Glubina
Ian McKellen
2005: The Magic Roundabout Movie
2005: Never Was
Dominic Monaghan
2004: The Purifiers
2004: Shotting Livien
Viggo Mortensen
2005: Alatriste
2005: A History of Violence

Miranda Otto
2004: The Flight of the Phoenix
2004: Through My Eyes
>
John Rhys-Davies
2004: Catching Kringle
2004: The Game of Their Lives
2004: The Shadow Dancer
2004: 12 Days of Terror (TV)
Andy Serkis
2005: King Kong
Liv Tyler
2004: Lonesome Jim
Karl Urban
Hugo Weaving
2004: Time Breaker
2005: Little Fish
David Wenham
2004: Three Dollars

Elijah Wood
2005: The Yank
2005: Sin City
2006: Happy Feet
2005: Everything is Illuminated