It seems only a handful of titles will still exist, outside of Microsoft maybe letting you use all of them on its next system. Have I missed anything or are 20 titles all you can currently salvage at the moment.
Hard drive:
-Hexic HD
Memory card 512 MB:
-Geometry Wars
-Worms
Xbox Live Arcade: Unplugged vol 1
-Bejeweled 2 Deluxe
-Geometry Wars: Retro Evolved
-Hardwood Backgammon
-Hardwood Hearts
-Outpost Kaloki
-Wik: The Fable of Souls
Xbox Live Arcade: Compilation disc
-Boom Boom Rocket
-Feeding Frenzy
-Luxor 2
-Pac-Man Championship Edition
-Uno
Namco Museum : Virtual Arcade
-Dig Dug
-Galaga
-Galaga Legions
-Mr. Driller Online
-Ms. Pac-Man
-New Rally-X
-Pac-Man
-Pac-Man Championship Edition
-Xevious
Edit 17/4/09- Just noticed today that some 512MB cards include Worms instead of geometry wars.