This is from Linda Lewis and contains useful information for your web sites.
It's not new but now you don't have to wade through everything to get it --
just cut and paste the code on your main page if you want it to be Google
searchable.
If you would like a Google search engine that gives the visitor the option
of searching your site or the web, you can use the following code - replace
www.mysite.com in the code below with the url to your site.
<!-- Google Site or Web Search Box Begins -->
<form method="get"
action="http://www.google.com/search">
<input type="text" name="q" size="31"
maxlength="255" value="" />
<input type="submit" value="Google Search" /><br/>
<input type="radio" id="web" name="sitesearch"
value="" /> <label
for="web">The Web</label>
<input type="radio" id="site" name="sitesearch"
value="http://www.mysite.com" checked /> <label for="site">My
Site</label>
</form>
<!-- Google Site or Web Search Box Ends -->