The offer different length spokes, stock and those for the hubs they sell. I got the stock length stainless steel spokes with the billet nipples. They offer colored spokes and colored nipples...for a price of course; I went with bare metal colors. Unfortunately the kits don't come with a spoke wrench but you could pick one up either at your neighborhood shop or on-line from any parts house (i.e. pit posse, motosport.com, etc) for fairly cheap. If you wanted to get even more precise with your spokes you can pick up a spoke torque wrench,
http://pitposse.com/potowrkit.html, but it isn't cheap. There are other spoke torque wrenches you can get but that's the one I use, it's decent and works well (also comes with an assortment of heads including a splined one for excel nipples). I finger tighten all the spokes getting them close the use a regular spoke wrench to get everything in line and snug then use the spoke torque wrench to get it all within +/- 5 lb-in of one another. RadMfg recommends the torque be between 40 to 45 in-lb; I believe stock is around 18 in-lb. You can do a google search on line and find plenty of tutorials on how to lace up and true a wheel; you might even find a turtorial on Youtube.