I'm guessing that the Fuji is your digital camera?
I just ordered a Lensmate filter adapter tube for my
Powershot G2. It takes 49mm filters. Along with it I
ordered a set of Hoya Macro "filters" (lenses) because
I'm still fascinated by super-close up work. Aside from
the macro set I think the only other essential filters
would be a UV (Haze) or clear glass filter to leave on the
lens in order to protect it, and a Circular Polarizer. Since
you're working in digital most color filters can be
simulated in postprocessing. The same is pretty much true
with other special effect filters, such as diffusers etc.

Oh, I might add that Tiffen makes a super-wide angle add-on
lens and a telephoto add-on lens. The widest wide angle
lens they sell is .45 times your lense's focal length,
and the telephoto is 2 times your lense's FL. I plan to try
one of each and see what their quality is like. (BTW, I've
read that in England these are much more expensive than they
are here for some reason)