It appears that Best Buy is now offering a downloading service for a few games they have listed for sale. Those games are:
Front Line: Fuels of War
Warhammer 40,000: Dawn of War Soulstorm
Call of Duty 4
Lord of the Ring Online: Shadow Angmar
Company of Heroes
Company of Heroes : Opposing Fronts
I have not found a specific downloading service feature that lists the games you can buy then download. I can only assume that this feature may come later. The list above is only the games I found so far
BestBuy
Bookmarks