I am experimenting with options on the SlideMagic template store. In this product, you can now select number of text lines, bullet style, and whether you want a side image or not, and the store will serve up the requested template. This is a very basic option implementation, I am looking into more sophisticated slide selections that could be useful for data charts and process diagrams for example, which would make it very easy to adjust the number of steps/years/months in these types of diagrams.
Subscribers to the SlideMagic store can download these charts (or a whole bundle full of text charts) free of charge.