Joshua Eichorn has posted some slides that he presented at a local PHP User Group meeting just passed that serve as an introduction to PEAR.

I'm hoping to improve the slides a bit and give this presentation at lots of other places. If any PHP User groups on the west coast would like me to do a presentation about PEAR drop my a line.

To help further the cause of PEAR, he's also offering the slides in an archived file for presentation anywhere.