^^ That may be true, but why don't Obsidian go the way of Valve and distribute an 'expansion pack' (with the missing content and more) with a similar system to Steam. The 'expansion pack' could cost from $5-$10 (within the price range of a premium mod for Neverwinter Nights, they could even emulate the system Bioware used ), and this low price could be simply achieved by the fact there would be no packaging distribution costs etc.
If ony it weren't Star Wars, that way Obsidian would be able to do their own thing without LucasArts strangling them........