How does one subscribe to BattleField 3 Premium Events

Currently, Battlefield 3 does not support cross-platform multiplayer.

According to this article, which quotes the studio head, Robert Bach, there are numerous differences between the PC and Console versions of Battlefield 3:

Limitations caused by hardware requirements causes the maximum number of players in a game to vary between versions:

The biggest difference between the PC and console version of Battlefield 3 is that we have 64 players on the PC and 24 players maximum on console...We tried to get more players in [to the console version] but then you need to scale down all the graphics, scale down all the destructibility, and sometimes you need to scale down all the map sizes

Alterations were also done on the maps themselves to make them work better for smaller numbers of players:

When we say they are smaller, it's not that we have cut them in half. But we tried to compact them slightly to keep the action up.

Judging by these differences, and the licensing/requirements mentioned by Stof, it is extremely unlikely that there will be support for such a feature.

On a side note, having such a feature would be a huge win for this game franchise, which is in constant competition with the folks over at Call of Duty, and I'd hope that any game promoter/marketer would have immediately jumped on it as a major selling point if it was a plausible future enhancement.

You will get 20 additional spot points if that enemy is killed after you spot them with the MAV (or T-UGS). And potentially a ribbon if that happens a few times in a row.

Also, you can left click to lock on and blow up enemy equipment, things like the recon mobile deployment beacon and other MAVs.

It's worth noting that the MAV also includes a passive detection ability exactly like the T-UGS -- if you leave it in a location sitting by itself, it will send out periodic "pings" that highlight any moving enemies nearby. If you don't want to be tied down piloting the MAV, it's a good strategy to drop the MAV in some out of the way area where it won't be spotted easily by enemies, and let it passively detect enemies even without you operating it. It is more effective when piloted, of course, but it also works with no human intervention too, kind of like SOFLAM.

Note that as of the latest patch, the MAV will destroy itself shortly after you respawn. It lives only as long as you do, including the time you are dead and waiting for respawn, it is not a permanent artifact once deployed.