I find this interesting. Wake turbulence from a heavy airliner can be very powerful. According to this ABC News article,

One of the things investigators want to determine is whether the plane was caught in the vortices of another jet that took off about two and a half minutes earlier, and whether that powerful turbulence could have been responsible for the crash.

"A very preliminary examination of the flight paths and the weather would indicate that the turbulence, the wake from another airplane, could have drifted into the flight path of this airplane," NTSB lead investigator George Black said today on ABCNEWS' Good Morning America. "That's something the data recorder will help us with."

Some witnesses have given similar accounts of the crash.

"They saw the aircraft wobble, they saw pieces come from it and that it went into a steep, spiraling dive into the ground," Black said.

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The article goes on to say,

As far as investigators can tell, the first sign that something was going wrong came 1:47 after the jet took off, when there was a rattling. Before that, the pilots were going through the routine checks that occur on any flight, according to what investigators have learned from the cockpit voice recorder.

Seven seconds later, the pilot said he believed the plane was flying through the wake turbulence of a jet that took off just ahead of it, and seven seconds after that the plane rattled again.

Four more seconds passed and the first officer, who was flying the plane, called for maximum engine power, but it did not help, and in another four seconds the pilots indicated they were losing control.

For 17 seconds they fought to keep the plane airborne, but once the vertical stabilizer broke off the situation was hopeless, experts say, even if the engines had not snapped off.

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One of the things investigators are trying to determine is whether turbulence could cause structural failure of the vertical stabilizer. They'll examine the recovered stabilizer and see if the attach points show signs of metal fatique or overstress. They'll also examine the fuselage attach points. It'd be very helpful if they could recover the attach bolts but those are probably somewhere under Jamica Bay and will be hard to locate.

Aviation accidents are almost always the result of a chain of events and this one probably won't be an exception. It's possible that the plane had some engine problems. Another airline pilot reports that one engine was smoking on takeoff. It's possible they hit turbulence as the cockpit voice recorder indicates. It's possible the turbulence overstressed the aircraft engine or structure, perhaps as a result of the application of full power. The flight data recorder was recovered yesterday but was damaged. The manufacturer is working to retrieve data from the memory chips. That could shed a lot of light on potential causes.

I know of one incident where wake turbulence from anothre caused a DC-9 to crash but I've never heard of it downing a larger plane like an A-300. Here are some interesting things I found searching a crash database:

Date: 03/18/1998
Location: Hsinchu, Taiwan
Airline: Formosa Airlines
Aircraft: Saab 340B
Registration: B-12255
Fatalities/No. Aboard: 13:13
Details: The aircraft crashed in the ocean shortly after taking off from Hsinchu. Possible instrument failure and loss of power in the aircraft's right engine in turbulence.

Date: 03/31/1993
Location: Anchorage, Alaska
Airline: Japan Airlines (Operated by Evergreen International)
Aircraft: Boeing 747-100
Registration: N47EV
Fatalities/No. Aboard: 0:5
Details: The No.2 engine and pylon separated from the aircraft at 2,000 feet. The plane landed safely. The engine separation was due to an encounter with severe or possibly extreme turbulence and a fatigue crack.

Date: 03/11/1982
Location: Mehamn, Norway
Airline: Wideroe's Flyveselksap
Aircraft: de Havilland Canada DHC-6 Twin Otter 300
Registration: LN-BNK
Fatalities/No. Aboard: 15:15
Details: The aircraft crashed while on a flight from Berlevåg to Mehamn after the failure of the tail fin and rudder in moderate turbulence. Overload due to a combination of clear air turbulence, mountain wave and the pilots spontaneous improper actions. There is some controversy surrounding this crash including the possiblity the aircraft was shot down by a NATO jet fighter.

Date: 05/30/1972
Location: Dallas/Ft. Worth, Texas
Airline: Delta Air Lines
Aircraft: Douglas DC-9-14
Registration: N3305L
Fatalities/No. Aboard: 4:4
Details: While practicing touch and go landing the aircraft crashed after getting caught in the wake turbulence of a DC-10.