Nintendo will definitely NOT honor any of your old game purchases for VC games. They're in business to make money. It costs money to create emulators and the bandwidth it takes to download VC games also costs money. Even browsing the Wii shop channel costs money for Nintendo. It costs money for them to run the free Wii email services and WiiConnect24. Every Wii in the world is constantly communicating with Nintendo's servers, which cost money. It costs money to allow you to download free updates. It costs money to create those updates. (I'm seeing a theme here.) Maybe one day UNICEF will launch a game console. Until then... no free VC games just because you purchased a game in the past.
*Done with my rant*