My party has just finished Zenith Trajectory. During the adventure, when the party ran into Dhorlot, the sorcerer in the party, who has the Wyrm Blooded trait from the HC, has taken a few Draconic Heritage feats (from Complete Arcane), and is now mulitclassing into the Dragon Disciple prestige class (i.e. he's really playing up his draconic heritage), went into the room with Dhorlot by himself, shutting the door behind him to protect the rest of the party. Dhorlot recognized that he might actually be one of his descendants, which didn't necessarily mean that he was safe from the dragon, but he at least allowed him to speak before deciding whether or not to eat him.
The sorcerer, for his part, suggested that he might be of use to the dragon. Dhorlot was skeptical, especially since he had seen that one of the other party members was a follower of Pelor, but the sorcerer said that he was only using the party in order to gain in power, and he rolled exceedingly well on his Bluff check, and Dhorlot (surprisingly enought) doesn't even have any ranks in Sense Motive. When the dragon mentioned that he would probably need to find a new place to live, now that the party had either killed or driven off all the kuo-toas, the sorcerer told him that he knew a place that would make a good lair, essentially offering him the kopru ruins from chapter 3.
The sorcerer gave the dragon his name, told him that he could be reached in Cauldron, and the dragon let him go.
The sorcerer is actually CG in alignment, and I'm not entirely sure what his goal is in offering to help the dragon, but now I'm trying to figure out how get the most fun out of this interesting development, and I thought that I would draw on the imagination and cleverness of the board's readers. If you have any interesting ideas, feel free to post them here, and thanks in advance.