Exactly Twanksta...
Noise is basically the digital version of film grain. It looks kinda like grain, but can look like ugly speckles or color artifacts. You get this from a variety of sources, including sampling errors in pixels, temperature-induced "dark current" in sensor elements, and signal amplification circuits.

Just as high-speed film gets more grain than low-speed film, digital photos taken at high ISO settings show much more noise than photos taken at low ISO settings. All compact digital cameras show noise at ISO 400 or above. Even top-of-the-line digital SLRs can have noise at high ISO settings.

You can use photoshop and decrease the noise. Nice pics though man.

...I think im going to put this in the Photography Tech sticky, just more detailed.