Thanks for the kind words guys. I wish I had more time tonight to write something and maybe take some pictures of the rigging of tubes - maybe an idea for the blog, right? Anyway, I searched the web for a good diagram but everyone that has some article about tube rigging doesn't have a good picture of it, but it's pretty simple to describe. I have an extra wide gap hook (I think it's a Mustad 3/0 for that Zoom tube) and I Texas-rig the tube on that hook, then stick the weight up the back end of the tube (gently squeeze it past the bend in the hook or you'll tear the tube), pointed end first. You can make sure it's all the way near the head for a quicker spiraling fall, or keep it more in the center for more "glide". A 1/16-ounce weight works good for a slower, drifting presentation, the 1/8 will get you down quicker.
Where and how to fish them? Find a nice half-submerged tree or large rock that breaks the current. Cast so the tube lands just upstream of the cover, and where the current will just barely drift it past the cover. Let it drift on a semi-slack line, but watch your line like a hawk. Some days fish will hit the tube as it drifts, other days you'll need to have it tick along the bottom, just experiment.