Mads Kristensen has put together a really simple "Search Engine Positioner" application. Give it a domain name scope (e.g. "pksoftware.net" ;-) ) and 1 or more search terms and you can easily see where you are listed (not ranked).

http://madskristensen.dk/blog/Trackback.aspx?guid=aa8e2134-9268-48cf-abaf-3e8414375bef