Not sure if any of you have used RIO's Shock Gum before but it is a really cool product. Especially a good product when fishing small tippets. It can be bought on tapered leaders but I prefer to use the spool of Shock Gum and just use a double surgeons knot. Could use an albright or nail knot as well....I have just found the double surgeon holds up and is the quickest/easiest for me to tie while on the water.
Fly Lines, Fly Leaders, and Fly Fishing Accessories - Rio Shock Gum