Slic3r 0.8.1 has been released at http://slic3r.org/
Looks like some interesting new features
- randomize starting points across layers -- preventing a bump when the starting/ending point is the same.
- automatically adding perimeters as needed -- I've had problems with printing the tops of spheres.
- improved surface quality
Looking forward to giving it a try!
Update: make that Slic3r 0.8.2