I personally raise them, and have not ate them. These beetles are eaten alive, starting with one and incrementing the number of beetles per day by one. This means that the first day you may start with one beetle. The second day you will have to eat two, on the third day you have to eat three, and so on, until a number of seventy (70) is reached. After the day when you have eaten seventy, you must start decreasing the number of beetles by one, meaning that the day after you have eaten seventy beetles, you will eat 69 (sixty nine) beetles, and decrease the number day by day until you reach one, then zero. After this the treatment will be concluded and you should feel better even before you have reached half of the treatment.
The treatment takes 139 days and in that period of time you will consume 4900 (four thousand nine hundred) beetles. If you have cancer or asthma it is well worth it to try it. A large initial number of beetles will be required. These reproduce fairly quickly but I have not measured the time that these take to reproduce. Further research is required.
Update: (July 5 2012)
We keep these beetles in a plastic container (from Walmart) without a plastic lid on top. Instead of a plastic lid, we have a metal mesh on top secured so it wont move. This container is in the living room at all times and away from direct sunlight. For food, we give them dried wheat bread and lots of raw oatmeal (the processed one, the cheapest one) from Walmart. I would avoid the one re-enforced with iron. The reason for this is because I tried to raise in a separate container five of these beetles and five larva (worms) under the exact same conditions, but with iron re-enforced oatmeal. These beetles seem to never reproduce until they all died. Even the larva died as larva. This was in about two weeks after I put them in the container.
For water, we use banana peels and sometimes apple skin. Never use actual banana "meat". Use the peels only. I have not tried to feed them banana "meat" only, so I dont know if they would eat them.
The wheat bread is dried by keeping it uncovered and making sure it does not develop any fungus.
Figure 1: Beetles to be consumed per day passed