Very nice hack!

One could also add an '@' behind the names on the main page user listing. And when you click it you'll be transferred to the thread the person is looking at.
like:
DVD Plaza@, leadZERO@, PeF@, ukliam@

in template 'loggedinuser' use this:

<a href="member.php?action=getinfo&userid=$userid">$u sername</a><a href="$locationLink">@</a>

and in index.php (line154) paste:
$locationLink = $location;

right under:
$username=$loggedin[username];
$location=$loggedin[location];

cya!