DS9 "In the Cards":
GIGER: Doctor Bathkin of Andros Three was the first to come up with the answer to solving the puzzle of death. Keep the cells energised. Keep them in the game by teaching them new mitochondrial tricks. Unfortunately, before he could finish his work, Doctor Bathkin died in a shuttle accident. Or so they say. And while the soulless minions of orthodoxy refuse to follow up on his important research, I could hear the clarion call of destiny ringing in my ears. And now, after fifteen years of tireless effort, after being laughed at and hounded out of the halls of the scientific establishment, after begging and scrounging for materials across half the galaxy, I have nearly completed work on this. The Cellular Regeneration and Entertainment Chamber.
At the end of the episode:
WEYOUN: Really? I have a background in, shall we say, creative genetics. I'd be most interested in hearing your theories.
GIGER: Well, it may take some time to explain. Let me ask you a simple question. Do you want to die?
Dr. Giger was on DS9 developing technology to make himself immortal. He enlisted the help of Jake and Nog to gain supplies for his project. Ultimately Weyoun and a couple of Jem'hadar transport Giger on their vessel. The episode ends with the conversation above and subsequently Weyoun trying out the chamber.
I am curious to know if Giger ever go the chamber to fully work, did the doctor stay with the Dominion, did Weyon help Giger in any way, etc.
Do we ever learn anything after this episode in-canon, writers notes, EU, or otherwise about Dr. Giger or The Cellular Regeneration and Entertainment Chamber?