In latest revisions a new LPE effect appeared - Lattice deformation.
But it hasn't been working properly these days.
The Lattice deformation LPE is here since at least 3 months. Could you be more specific concerning what doesn't work ?
I've also noticed that in some build, the effect was broken, but currently in last svn it seams to work well.
I worked on it, I might be able to fix any bug.
Currently we can bend a
shape in a few way, but only in one direction.
There is also the Envelope deformation LPE that you may consider.