I could not agree more with your comments!
I have been using the PDL for over a month now and it has been hard to find the information I need when I need it. This is why, I decided to make this post about the PDL References (so people who are starting to use PDL, just like me, could have an easier road ahead than the one I had). Having said that, I really believe in the power of PDL for scientific computation and I plan to use it in several projects. One of these projects involves using Fuzzy Clustering for Image Segmentation. In fact, I already re-wrote the code I posted in RFC: Fuzzy Clustering with Perl to make use of the PDL. The new code is available in lin0's scratchpad. I will post my results as soon as I have them ready. In the mean time, I may do one or two posts related to the use of PDL.