Chances are probably not, but you never know. There have been many occasions where I have had to hit the power button and I have only encountered one problem as a result and that was a serious DS corruption that I was luckily able to recover from.
You can try the "vulcan death grip" which will bring the server to the Hex Debug screen where you can exit to the DOS prompt. This can be done by pressing the following keys together (you'll see why I have named it when you try it):
Left Shift
Right Shift
Left Alt
Escape
You will be presented with a Hex Debug screen. Type Q to quit to DOS. This is probably better than powering off but you still run the usual risks.
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"It's true, its damn true!"
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