We have only had 2 character deaths so far and we are in Chapter 4 (they just got past the Pit of Seven Jaws).
Our first death was the rogue of the party. He was critted by the trap on Triel's door and it reduced him instantly to -15. The party started counting their money to see if they could get him raised and the player said he would just create a new character.
His next PC was a sorceress with an affinity for fire spells. She ironically was cooked in Gotrod's fire breath as the group attempted to rescue Crazy Jared. One blast of fire, 53 points of damage later (I rolled near max - and we make all our rolls in the open) and the 30 HP sorceress became a charred mess on the grass.
The player is now playing a Paladin named Ned. Ned proved his survivability after being hit by 5 breaths from the cryohydra in the first round, made all of his saves and came out of the encounter with 19 HP.
They enter the Kuo-Toa stronghold tonight... looking forward to seeing what else happens. BTW, the party make up is:
3/3 Wizard / Druid (going for Arcane Hierophant)
6 Priest of Pelor (going for Radiant Servant)
5/1 Priest of Pelor / Wizard (no prestige class chosen yet - he may stay straight with these 2 classes.
5 Paladin (going for Knight of the Chalice)
6 Cleric of Selune (transported to Greyhawk in a portal accident - i thought it was a cool idea - and it makes for great roleplaying)
The party is surprisingly cohesive. Lots of healing available, the future Radiant Servane is surprisingly proficient with a spiked chain, arcane support is available (he will have 9th level spells when he hits level 19), and the Paladin provides a tank for the group to hide behind. I don't see anything game breaking in this group. Everyone in it is human (except for the Wiz / Drd - he is a half-elf)