Dice posted this on their FB today:
Originally posted by Inactive UserGood news, Battlefield 3 PC players - The latest patch for Battlefield 3 will be rolling out tomorrow. The ~1.6 GB update will start rolling out at around 9AM UTC / 11 AM CET March 29. You can read the highlights here: http://blogs.battlefield.com/2012/03/beep-beep-battlefield-3-update-goes-live-on-pc-tomorrow-improved-commo-rose-and-minimap-lots-of-fixes-and-new-shortcut-items-live/
The Xbox 360 patch will be coming soon. We'll have a date for you ASAP.