We define a family of homogeneous ideals with large projective dimension and
regularity relative to the number of generators and their common degree. This
family subsumes and improves upon constructions given in [Cav04] and [McC]. In
particular, we describe a family of three-generated homogeneous ideals in
arbitrary characteristic whose projective dimension grows asymptotically as
sqrt{d}^(sqrt(d) - 1).
We show that an Artinian quotient of K[x, y, z] by an ideal I generated by
powers of linear forms has the Weak Lefschetz property. If the syzygy bundle of
I is semistable this follows from results of Brenner-Kaid; our proof works
without this hypothesis, which typically does not hold.