I would like to point out a few things that were more or less glanced over by Zaq in his FAQ.

Truename research is far more useful than he lets on, for one, you can take the time to learn the truename of spells, or any object. This actually can break the game because a truenamer that finally gets the Truenamer Research feat can, if he has access to a spellbook or library or scroll, learn any level spell and potentially use it once the truename is learned. In one campaign my truenamer learned the truename of the Limited Wish spell at level 2 and had complete access to it far before any character should. And because a truenamer's abilities lie in the ability to enact a truename, he is only limited by universal laws (as found in ToM) as to how often he can use learned spells. Thus a truenamer is far more versatile than explained. They can become very powerful very early on, and with high Int and bonuses to knowledge skills and the truespeak skill they can accomplish various magic very quickly with successful skill checks.

The fun part about this is that See The Named then works for known spells, any object that has that spell or any creature that can cast that spell pops up on the Truenamer's "radar" sort to speak.

Lastly, Zaq failed to mention the number one reason why the Truenamer is actually a very broken class (and therefore fun), a truenamer can cast a spell or utterance on a person without line of sight or affect, they can cast a spell on a creature, object, or thing that they know the truename of, from anywhere and affect that creature, they're also immune to many of the affects that dampen magic. Anti-magic fields don't necessarily apply to them and dispelling an utterance is impossible (except for another truenamer).

Lastly Truenamers can become masters of Dark Utterances and are most often immune to the affects of Dark Utterances cast on to them.

Otherwise a very nice guide that I'll be referencing in the future.