Will the addons that people have programmed for TBC work the same as they do in WoW 2.0? I figured since both are probably running LUA 5.1 that they should be the same but...maybe not because you're not accounting for Lv 70 yet or for Draenei/Blood Elf species.
Yes, WoW 2.0 is the major functionality change update (hence the major version number bump). The Burning Crusade will be a minor version number bump with very few changes. WoW 2.0 addons should work largely unchanged in the Burning Crusade.
