1. Is there a central database / website that contains a whole bunch of downloadables?
2. Are the styles variable? For example, if you use the one mentioned above to enhance blue skies, can you vary the intensity of blue from minimum to maximum?
1. Follow the link in DognBone's post above for the additional Styles supplied by Canon.
2. Using Picture Style Editor you can make as many custom Styles as you want, varying luminousity and/or color values. Also, since you load a RAW file into PSE in order to preview the effect as you are setting the values, you could make a custom P.S. specifically for a given RAW and when you get it to what you want, save it and then go to DPP and apply the saved P.S. Because it means working with two separate applications, it seeems a bit slow but it will give you very powerful control. I can't understand why P.S.E. is a standalone and not integrated into DPP.