The Eberron campaign setting makes the whole raise dead/resurrection/etc issue kind of interesting, in that it’s just not going to happen in the normal course of events. Of course, this assumes that the DM and players are adhering to the spirit/intent of the setting, as opposed to just playing in “business as usual” fashion but simply in a different setting.
Eberron kind of did away with “racial” deities/religions (with one notable exception). Religion is a personal decision that has little to do with race or nationality (again with one notable exception). There are four major religious divisions, each with its own take on the whole “raise the dead”:
The Silver Flame: The “deity” of this religion isn’t so much a “being” as it is a “force”, though it exists and is visible in the church’s main cathedral. The Flame is essentially the force of Good that keeps the major evil demons and such bound, preventing them from wreaking havoc. The Church of the Silver Flame teaches that when a follower of the Flame (or even a Good non-follower) dies, his or her spirit immediately joins with and strengthens the Flame. Therefore, raising the dead is virtually forbidden, because returning the spirit to the body would subtract that spirit from the Flame, slightly weakening it. A cleric of the Silver Flame would simply not perform the act (barring an overwhelmingly compelling reason or a direct command from the Flame itself), and a follower of the Flame would not want to be raised (and the various “raise dead” spells in D&D require that the deceased’s spirit be willing to return to life).
The Church of the Silver Flame is the one exception to the “no national religions” concept; it’s based in the nation of Thrane, which happens to be a theocracy where the Church of the Silver Flame is the government. The religion has plenty of followers outside of Thrane, however.
The Sovereign Host/Dark Six: This is a pantheon of 15 deities, who may or may not actually exist. The Sovereign Host are the nine non-evil deities of the pantheon, while the Dark Six are the mostly evil deities (though one is Chaotic Neutral). Worship of the Sovereign Host is the most widespread religion among the civilized races of Eberron. Worship of the Dark Six is mostly limited to the “uncivilized” races. Though active worship of the Dark Six is strongly discouraged in “civilized” lands, its existence is still acknowledged and some civilized people regularly pay tribute to these deities when appropriate (for example, sailors regularly offer tribute to The Devourer, who has dominion over the seas). But followers of either group hold essentially the same belief about the afterlife: upon death, a person’s spirit travels to the plane of Dolurrh, where it immediately begins to forget its life, eventually becoming a mindless entity that cares about nothing. So unless a raise the dead spell is cast almost immediately after death, the chance of the spell being successful steadily decreases the longer the person has been dead. Again, that’s due to the requirement that the spirit must want to return to life. Unlike the case of a spirit that has joined with the Silver Flame, however, the spirit of a Sovereign Host follower simply stops caring enough to want to return, and is eventually unable to even make the decision.
The Blood of Vol: Another religion with an actual, tangible “deity”, though “deity” isn’t really the correct term since the focal point of the religion is Vol, an undead, half-elf/half-dragon lich. And the religion itself is more of a front for her schemes than anything else. This religion teaches that death is something to be avoided altogether, and it’s considered an honor to become an undead creature. “Raising the dead” in this religion generally consists of being brought back as a zombie, an animate skeleton, or some other form of undead.
The Undying Court: The one “racial” religion of Eberron, practiced solely by the elves of Aerenal. It’s sort of the opposite of the Blood of Vol. Honored elves who distinguished themselves in life are brought back after death as “undying”. These are essentially “good” undead - animated by “positive energy” rather than the “negative energy” of undead. These “undying” serve as revered councillors to the rest of the elves. Again, no actual deity here. Also, not all elves follow this religion - those who live outside of Aerenal tend to practice the same religions dominant in the culture they live in.
In any case, though, getting raised in Eberron is difficult, even outside the restrictions mentioned above, simply because there are very few clerics who are high-level enough to cast the spells. The continent of Khorvaire, where most of the action takes place, has just come out of a century-long internal war, and there simply aren’t many high-level NPCs of any sort left. The idea there was to break away from past campaign settings where there always seemed to be some high-level NPC available to bail the player characters out if they got in over their heads; the PCs are supposed to be the amazing heroes.