The only way to get the fleas out of the house is to first get them off the cats. As long as the cats are not treated with appropriate flea preventative, even a single surviving flea in the entire house will leave you right back to a situation like the one you have.
If the cats are appropriately treated so they are no longer hospitable to the fleas, then the fleas will have nothing to eat. If fleas don't have anything to eat, they die. When the next cycle of eggs hatches in a month or so, the new fleas will have nothing to eat again, provided of course that you have continued the treatment. At that point your problem is basically solved.
Revolution can be safely given every two weeks (the vets where I work recommend this to people if they are dealing with heavy parasite loads) and from my experience it is the most effective treatment on the market.
I have gotten rid of extremely severe flea infestations (meaning so severe that I had literally dozens of fleas attached to my legs just from walking in the room) without ever having to bomb or spray the environment. I did three simple things:
1. Treated every cat with Revolution
(I should mention that the problem actually seemed to get worse after I did this. This was an illusion. I saw more fleas and was bitten more because the cats were no longer hospitable to the fleas, so their only possible food source was yours truly. This kind of sucked - no pun intended - but it only lasted a few days because fleas can't actually live on a human the way they can live on a cat.)
2. VACUUMED, VACUUMED, VACUUMED. Think Martha Stewart on amphetamines. Every single day, at least once a day, for a week. All carpets, all upholstery. I didn't hit every carpet or every piece of furniture every day but I spent at least 30 minutes a day vacuuming, concentrating in the places where the cats spent most of their time.
3. Washed all bedding and pillows (mine and theirs) in hot water twice a week.
4. Gave the next treatment of Revolution exactly 4 weeks after the first dose, per package instructions.
That was it. It took effort and some diligence and it was not a "quick fix", but the problem was completely solved without using harmful chemicals and without throwing time and money on random grocery store insecticides that may or may not do what the label says they will. Nothing takes the place of physically removing the fleas and eggs from the environment and making sure that any remaining fleas have nowhere to live and reproduce. This takes work and you don't see real results in the environment for up to a week or even a little more, but it is highly effective, 100% safe for you and the cats, and ultimately much less expensive and time consuming than systematically buying every insecticide on the supermarket shelf and hoping for the best.