Colors ...

Found a nice utility at a website that suggests complemetary / combination colors depending on any color you choose.

ColorMatch 5K
http://www.colormatch.dk/

ColorBlender
http://colorblender.com/

Featured in Web 2.0 Awards
http://web2.0awards.org/

AJAX

I tried implementing an AJAX call to retrieve the URL for a random photo to be displayed in a static html page.

A List Apart had a good article to get me started.
Getting Started with AJAX

Ran into a problem where IE implementation of XMLHttpRequest ActiveX Object automatically caches all GET requests. This wikipedia article about XMLHttp gave a workaround by inserting a dummy random parameter in the URL.