Never mind... I figured something out myself.

Here's what I did... (This assumes you have it installed.)
1. Run the following query:
Quote:
ALTER TABLE user ADD motd SMALLINT(6) DEFAULT '0' NOT NULL;
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2. Find this comment in index.php:
Quote:
/* This template is either outdated or the admin wants to reset it.
Either way, we need to choose a new member of the day. Aren't you excited?! */
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Add directly below it:
Code:
$DB_site->query("UPDATE user SET motd='0' WHERE userid=$daybits[1]");
3. Still in index.php, find:
Code:
$DB_site->query("UPDATE template
SET template='".addslashes($newtemplate)."'
WHERE templatesetid=-2
AND title='memberoftheday'");
Add directly below it:
Code:
$DB_site->query("UPDATE user SET motd='1' WHERE userid=$newmember[userid]");
4. In admin/functions.php, find:
Code:
eval("\$post[profile] = \"".gettemplate("postbit_profile")."\";");
Add directly ABOVE it:
Code:
if ($post[motd]) {
$motd = "<smallfont><b>Member of the Day!</b></smallfont><br>";
}
5. Add $motd to your postbit template.
This not only adds two queries to the home page (which is not good, but better than 25+ more queries on each showthread page) but it allows the Member of the Day to be recorded as a variable in the user table. This might be useful if, say for instance, one wanted to have multiple Members of the Day for some reason.