I did a quick skim of the thread and could not find this information posted.
Not only is the Starcraft II DRM a one time activation on install, it also requires a 30 day reactivation. Meaning you have to log into your battle.net account at least once every 30 days to keep playing.
I will not buy this or any future Blizzard games.
I only found this out after e-mail Blizzard to confirm the online authentication.
Quote from e-mail.
"Greetings!
You would need to connect to the internet at least once every 30 days to re-authenticate your StarCraft II account in order to continue to player the game in offline mode, that is correct. StarCraft II requires an active internet connection to play. This is stated in the System Requirements on the retail box, as well as our online System Requirements. Without an active internet connection, you will not be able to log in to Battle.net to authenticate your copy of StarCraft II.
When in offline mode, you can save your games and those games will be saved locally on your computer. If you play while logged into battle.net, your autosave points in the campaign will be saved on our servers. When transfering to a new computer, there is always the option of simply moving the entire game folder to the new computer's Hard Drive in which case you won't lose your saved game.
We are committed to making StarCraft II as enjoyable as possible. We appreciate your feedback. I will forward your report to the appropriate people. While I cannot guarantee a response, I can assure you it will be read.
If you have any further technical questions or problems, please feel free to contact us at
techsupport@blizzard.com
Farewell,
Game Master Aurilaquet
Customer Services
Blizzard Entertainment
www.blizzard.com/support"
Please help me spread this information. I can not find it publically anywhere and I am appalled by this fact. I was so looking forward to buying the game and I am glad I researched this before dropping any cash on it.