Wayne is giving you excellent advice. Trying to mix a Nikon SB800 with other speedlight systems gives up most of the superior functionality of the Nikon CLS technology. If you really want to get into the world of wireless remote speedlights, purchase the SB800 as the on-camera Master/Commander (Nikon uses both terms in various literature) and one or more SB600 speedlights for use as remotes. Entire new worlds will open up for you.
HBB in Phoenix, Arizona
(My herd of SB800 speedlights currently numbers an even dozen, with perhaps a few more on the way for the really spectacular night shots! I would not dream of trying to mix them with other brands.)
Photography is a journey with no conceivable destination