Ask HN: Where can I get good powerpoint/keynote templates?

Say you are pitching your startup to anyone (investors, partners, Y Combinator audience, etc.) where is the first place you go to get nice templates for your presentation. Yes, I know you should customize it - and if you have access to a graphics person that would be awesome, but what if you don't? - but where do you start?

I am talking about Wufoo & 37 Signals quality presentations - http://www.flickr.com/photos/wufoo/2985775820/ & http://37signals.com/svn/posts/981-the-secret-to-making-money-online respectively.

Also, what are some tips for other sites where you get good photos/font ideas/any other ideas that go into making a presentation good...not bland and lame.

Also, it seems that everybody sticks to Guy Kawasaki's rule of 10/20/30 - http://blog.guykawasaki.com/2005/12/the_102030_rule.html

Feel free to add as many tips and links as you would like, that can help everyone make better presentations.

Oh and by the way, I know that presentation zen is a good resource - http://www.presentationzen.com/ - but they don't typically have templates and other downloadable stuff (or that I can find anyway...if you have contrary info please provide links).

Thanks :)