After successfully downloading the Metal Gear Online
beta, we recommend launching the game as soon as possible. Yes, online play won't go live until Monday, but there's a significant patch that you'll have to download before the beta's start. If you wait until Monday, you'll waste precious time that could be used fragging other beta participants.
There are two delivery options, one which involves peer-to-peer connections, a la BitTorrent. Unfortunately, the hours-long download cannot be background downloaded. PS3 is certainly encouraging a lot more sandwich eating, no?