Bazajaytee from DICE recently announced the details of the next patch for Bad Company 2 which is currently in QA with an expected ETA of early next week. Here's some of the main changes; check the previous link for the full list:

Server - Some potential sources for lag/rubberbanding have been eliminated
Server - The old reserved slots has been replaced by a kick-on-demand system like in BF2
Server - Infantry only mode available per-level
Server - Banlist can contain up to 10.000 entries
Gameplay - Knifing people in the back works again (we backed out the change that we had done for Server R11)
Server Browser - Servers are sorted into 3 categories: Normal, Modified, Hardcore depending on their settings
Server Browser - Join queue system when attempting to join a full server
Server Browser - Pings are sent via an alternate mechanism, which should work for non-Administrator users as well
Client - Removed K/D ratio and Skill Level filters in the leaderboards
Client - Any points you get while being dead will be added to your score

It's great to see DICE are fixing the knife issue bought on in the last patch. Infantry only will certainly make for some interesting scrims :) No word on the M1 issue yet though :/

Edit: It should be particularly noted that this updated is expected to weigh in at around 500mb. Given the nature of the current patch system in place for Bad Company 2, this would definitely be a metered download for Australian users, making it a more-than-usually hefty impact on your monthly quotas (though Steam users might get away with getting it from an unmetered server, if they're lucky). We've contacted Dice to see if a manual patch is a possibility - stay tuned. promoted/edited forum item

Update: Dice have confirmed that there will not be a manual patch available for this release. So if you need to do things to budget 500mb in your monthly quota for this update, you have been warned!