So I'm currently testing the Sony Cyber-shot DSC-H50 (look for the review next week), one of Sony's high-zoom cameras that among a gazillion other features has an on/off switch for Sony's NightShot infrared shooting mode.
As you can see, I managed to snap a picture of my cat hiding under a table in a darkened room, at which point I thought to myself, "Surely there must be a better way to use this feature." And there is.
Rocky Nook's Digital Infrared Photography by Cyrill Harnischmacher ($24.95) is a guide to infrared photography with your digital camera. I know, I know, you figured that out on your own, but the book covers basic theory for shooting in infrared, as well as guidance on capturing images and post-processing. You'll also find information on cameras, filters, and equipment.