I bought a new toy yesterday too; an infrared lens filter. I've been searching for this particular filter for about 2 years now. I finally found one yesterday and I've already take a bunch of photos with it. It's very very cool! Scientifically speaking, the filter alows us to see light in the infrared spectrum (600 Nanometers and up) which the human eye canot see. The filter is completely opaque and no visible light will pass through it; only infrared radiation. The resulting photos are surreal and amazing to look at. Trees, plants and grass are nearly pure white, the sky is black and the clouds are very intenst and defined. Atomaspheric haze is eliminated completely resulting in virtually unlimited depth of field. I love it!!!
I've uploaded a few photos I've taken already with it. They are larger image file sizes than what I usually post here, so you can click on the following links to view them. That will prevent the page from loading rather slowly for those of you with dial-up connections. Here's the links:
There's even a color infrared image of me here:
Me in Infrared