Here is some code that you can whack on your blog to make a Yahoo search box.

<form action="http://blog.news.search.yahoo.com/blog/search" method="get">
<input type="text" name="p"/>
<input type="submit" value="Search Blogs"/>
form>

I haven't tried this yet but I'm sure it works...maybe I could spice it up with the Yahoo! icon...anyone listening!

PS: I like the idea of trading codes, get some help on enhancements, a one stop help desk from the Web2.0 community.