  One of the open questions in the geometry of line arrangements is to what
extent does the incidence lattice of an arrangement determine its fundamental
group. Line arrangements of up to 6 lines were recently classified by K.M. Fan,
and it turns out that the incidence lattice of such arrangements determines the
projective fundamental group. We use actions on the set of wiring diagrams,
introduced in [GTV] (math.AG/0107178), to classify real arrangements of up to 8
lines. In particular, we show that the incidence lattice of such arrangements
determines both the affine and the projective fundamental groups.
