That sounds cool -- might look into that this winter when I have some time.
For myself -- I have a database on my computer with the Irises listed alphabetically. The information I keep there is: the year I acquired the cultivar, the company or person that it came from, the hybridizer and year of introduction, a brief physical description of color, a coded description of where it is planted, and a list of photographs of each one.
In addition to that, I have maps of every Iris bed showing the physical location of each plant. And each plant has a Kincaid metal marker showing the name of the Iris, the name of where it came from and the year of acquisition. I do not remove the markers in the winter -- they remain year-round.
I love Debra's pictures of her beds with location shown and photo of each cultivar!!!