I wanted to put an e2 search box into my default page (the one that opens up when I launch my web browser (which shall remain nameless)). Here's the HTML code:
<FORM METHOD="get" ACTION="http://everything2.com/">
<INPUT TYPE="text" NAME="node" SIZE=28 MAXLENGTH=80>
<INPUT TYPE="submit" VALUE="everything2 search">
The SIZE and MAXLENGTH tags of the text input element can be changed as you see fit, as can the VALUE tag of the submit input element (you could change it to "search", for example).
Have fun with it.