I finished my lifting platform.
I ended up using the BC Pine ULX plywood for the bottom 2 layers and using a sheet of cabinet-grade hardwood plywood for the top. I got my 3/4" x 2' x 8' rubber mats from therubberman.com. I did not glue the plywood sheets together; only screws. I put on 2 coats of cherry stain and then 3 coats of polyurethane on the top with very minimal sanding; it's not slick at all.
here are pics:
there are larger pictures on my picasa page:
thanks for the help guys (and gals)!