This particular post talks about finding inspiration for your templates from websites that you like. It is a great place to find simple color palettes to really make your slide pop or have consistancy.
Some of the tutorials include creating that nifty page curl effect and having images or text appear like a stack of paper.
where you will find several well-designed templates, tutorials on how to create your own designs, and maybe a few ideas to bring those presentations into 2010.
Here is one of the templates to download to whet your appetite