I agree with Leeneia about the vacuuming. You may be able to get a small percentage of the flea eggs with a vacuum, but surely not much. As for the adult fleas, they can easily jump far out of the way of the approaching beast. Seems to me that the vacuuming is really for the pet dander and for the tiny bits of dried blood the fleas leave behind on the pets' skin and fur that the pets then scratch off.
But just in case you do get a few eggs with the vacuum cleaner, be sure to empty the bag promptly. Can't hurt to spray the rotating brushes with flea-Raid, too. No sense in letting them hatch and infest your vacuum and spread back out into the room from there!
I swear by the dab-on-the-pet's-neck stuff myself (Frontline and the like). I don't mess with the over-the-counter stuff, though; I get the prescription-strength variety from the vet.
I used to use flea bombs. Does anyone do that anymore?
Euchh.... This thread is starting to make me itch...