General Support: Add ads in home page?

First of all, I would never use adsense on a personal site, but than again this is perhaps no personal site :).

It's more difficult because you would have to include the google code inside collections.php, but it's possible I think.
Something like this (look near the bottom of the code):

print '<ul id="slides">';
while(plogger_has_collections())
{
$row = plogger_load_collection();
$desc = plogger_get_collection_description();

print '<li class="thumbnail"><a href="' . plogger_get_collection_url() . '">';

// generate XHTML with thumbnail and link to picture view.
print '<img class="photos" src="'.plogger_get_collection_thumb().'" title="'.$desc.'" alt="'.$desc.'" />';

print '</a>';

print plogger_download_checkbox(plogger_get_collection_id());

print '<div class="tag">' . plogger_get_collection_name() ;
print '<div class="meta-header">(';

$num_albums = plogger_collection_album_count();
print $num_albums . ' ';
print ($num_albums == 1) ? "album" : "albums";

print ')</div></div></li><li>adsense code</li>;
}
print '</ul>';
} else {
print "No collections yet";
}


<li> should get a display:block and float:left. Since you will have only two <li> in that place it could work this way.
I thinks this wil ask for some trial and error :) since I don't know what kind of code Google uses.