I think this'd be a great idea. The way I see it implemented is that lasers are fired straight ahead normally, but when you have an enemy fighter ahead of you, they start to "lock on" until your fighter aims for you. So if you manage to keep someone ahead of you for 10 seconds or so, it's a confirmed kill (although maybe it should be less for balancing reasons, the maps being smaller and all).

As for which crafts have this ability, I suggest you watch this.
-At 2:32, when the leftern TIE Interceptors blows up the A-Wing and then crashes into the Calamarian Cruiser, I think it fires its lasers a bit to the right.
-At 2:42, an X-Wing very clearly pivots its lasers slightly to the left to take out a TIE interceptor.
-At about 2:50, a TIE Interceptor appears to fire its lasers in a different direction than the one it's travelling in.

No, the Falcon has dorsal- and ventral-mounted turrets which, as seen in ANH, can be aimed much like the turrets of, say, a real-life B-17. Nothing to do with targetting computers.

"This card from the SWCCG game demonstrates the TIE's ability to swivel the aim of its weaponry, firing in directions different from the fighter's heading."

....just badly drawn lasers! o.O

Generalandrew the site says page not found.

UPDATE:

I found this, http://theforce.net/swtc/tie.html . Scroll down to about 1/4th the page, the fourth bar above the "Cockpits" section. TIE piolets do have the option of swivling their cannons a few degrees.

the tie is fast enof to turn around and make 2 to 4 more round before they get shot at. (with good fighter pilots, not some actors )

Actualy, I have to disagree. Almost every ship in Star Wars for fighting purposes has a targeting computer.

again, a targeting computer isnt a moving gun like vaders special fighter had.
its a damm progam. al ships have them, even small hovering repair droids.