Much to my chagrin, I realized I forgot to include one of the more interesting features in the lattice package. You can quickly turn a quantitative variable into one of levels of equal counts. This provides a nice way of looking at slices of your data in a trellis plot. These slices are referred to as shingles as they overlap according to your specification.
Here is a simple code example, using the quakes data included with R:
> Depth = equal.count(depth, number=6, overlap=.05)
> # with equal.count we now have sliced depth into 6 parts with an overlap of 5%
xyplot(lat~long | Depth, data=quakes)
The way to read this plot is starting from the bottom left working right then the next row up from left to right.