PVC Yagi's are much like Pringles can yagi's, but with a piece of pvc pipe instead the Pringles can. PVC is more weather resistant, more drop proof... and it looks less tacky.
Here's a picture of my initial test one (with an attached shoulder strap). it gets about 8dBi. I'm somewhat disappointed, but I think was a bit sloppy in the construction. I'm going to make a smaller one using 1" pvc instead of 2", and I'm also going to make a second, and hopefully more precise large one for rooftop mounting at a friends house.
as soon as i start making those 2, i'll post some real directions complete with pictures.
Very nice! I'm glad someone in Oregon is starting to make antenna's 
You might want to check out BenSanders stuff, he's been doing a lot of research on building antenna's and knows where to get all kinds of cool (and cheap) stuff for mounting gear. -- AdamShand
If you are considering building one of these I have over 20 feet of 1.5" ID PVC left over from another project. Let me know before a meeting and I'll cut off whatever size you need and bring it. -- MichaelRasmussen