In the necromancer thread Jason mentioned that he was thinking about a necromantic animal companion for the necromancer. This got me thinking...
Why not include an optional school-themed familiar as part of the familiar option? The classical Snake is great, but what if the Illusionist could get an Illusionary Snake? Or an undead snake? Or (gasp) an elemental snake themed to the evoker's chosen element? The specialist familiar could give a slightly better but more specific bonus to the wizard (+1 damage to fire spells instead of skill points for example)
Secondarily, this idea could be expanded to include special/specific powers for the item familiar as well. I'm sure all the DMs out there can assemble a few hypotheticals themselves without writing about a necromantic ring (though it would clearly be amazing and I defy any attempt to prove otherwise).
Third, these could easily be turned into an "Improved Familiar" style feat, Specialist Familiar, for instance. More is better gents. If you're running out of pages, charge $5 more for the book and fill the extra pages with AWESOME stuff and we'll definitely still buy it.
And of course the juggernaut Universalist could receive a stunning, brilliant, astoundin': Normal familiar/item familiar. That's right. Normal. Hey, he doesn't have prohibited schools. He can take a long walk off a short flyin' carpet if he thinks he's getting a necromantic ring.