Tightline nymphing for beginners

Here's an interesting and thoughtful way to nymph those deep pools that have fast water as well.  There have been many occasions that I fished similar areas and thought, "If I could just get my fly down to the bottom where the fish are, I know I could catch a few."  My only gripe is that I wish they would have described some of the knots that were used to tie the nymphs to the tippet...but I bet there's an answer out there on the interwebs.  Probably worth a google.