Darklone said:
Sleeping, aging and eating: Ah, right, I remember that part in the book... Boah that's evil. Most of the dudes who are stuck there will turn to dust when the players manage to take them out there. Well. That's better for the PCs than what would have happened with the imbedded slaad eggs in all those guys.
Although this is what some authors have suggested, I don't myself suggest you to do the same about sleeping/eating/aging. I played as suggested once, and I was severly blasted by my players afterwards...
First of all, "timeless" does not mean that your time is slowed to zero, which would mean that you stay there one second and when you come back the world has already ended.
In a "timeless" plane, everything which depends on the passage of time is "frozen" (admittedly, it could be simply reduced to a minimum advancement).
It is not the same thing, and when coming back to your material plane after one hour you could either find out that on earth less or more than an hour or also exactly an hour has passed. Unfortunately IMHO the authors have messed up a little between the idea of having the time running at a different speed (see "flowing time" or "erratic time") and the idea of time having a different effects of creatures: someone on a plane with flowing/erratic time would not notice anything different until they come back to earth and see that for the others time has flown faster/slower.
That said, what effect the time has on you on a plane such as a "timeless" one (or there could be a plane with accelerated effects, although this is not included in MotP's examples) has nothing to do with your coming back to your original plane. You stay 1 year in a "timeless" plane without need to sleep or eat and you don't age, diseases/wounds don't naturally heal but also don't get worse and so on... when you come back IMHO you should really start from whatever condition you are NOW.
If you prefer the idea from MotP, that basically the "timeless" plane is instead accruing all those effects in some kind of "buffer", ready to release them all at once whenever you leave the plane, you are welcome to do so, but I really suggest you to inform your players beforehands. I didn't, and I was criticised a lot for my lack of logic - which of course is not completely mandatory in D&D, but it's still in the mind of many players and it helps playing well.
BTW, I guess you could treat the eggs in the same way, whichever the way you choose: either their idle time is simply suspended while there, or the hatchling is simply buffered and they get released at once when they exit.