As an aside - I did a little bit of research into digital IR. With the right camera (probably the high end Sony - I forget the model but it has night mode) it is straightfoward. Digicams (as opposed to Digital SLRs) have a filter to cut out infrared light in front of the sensor. The funny thing is that my old Canon A75 does a poor job of cutting out IR light. If you point it at the IR light emited by say a remote control - it shows up as white on the LCD.
This is in no way a good solution since what you really want is to remove the IR filter, and believe it or not there are lots of articles on the web about how to do that yourself. There is also a guy that will do it for you for a couple hundred bucks and put in the filter you want instead.
I looked at a lot of digital infrared stuff over the last few weeks. It isn't the same as film (I don't think) because of the lack of a anti-halation layer on the Kodak film which causes all sorts of glows and whatnot as light bounces around and makes its way back through the film. But in this arena - digital looks easier. Again - with the right camera.
Again - the A75 is not what you really want since you will want to do this in RAW mode. But just for fun - if I have nothing better to do I might open the gizmo up and see how hard it is to remove the filter.
* * *
I found an excellent summary of shooting with film IR here by David Romano.* * *