Don't really want to admit to being a beetle expert, but it does fall to being part of my job, I'm afraid...
If they are definitely oblong rather than oval it's likely to be a furniture beetle or a biscuit beetle (although these are only normally max 5mm) rather than a carpet beetle. Furniture beetles (obviously) eat wood, carpet beetles eat silk, wool and cotton and biscuit beetles eat (yup, you've guessed it) dried food.
If you can find a hole in something and describe what the hole in in and the size and the frass (the sort of sawdust made from the hole), I can probably do a better job of identifyng it. I haven't looked at Soupdragon's links, but bear in mind US beetles are different from UK ones!
In museums we tend not to use chemicals because of the damage they can do to people and other objects so our technique is to track where they are coming from and solve the problem this way. We do this with sticky traps around the room. You can buy them from preservation equipment ([email protected]). Anything that's been infested (furniture, clothes) you then have to isolate as it's probably got larvae in it. Wrap it in plastic and if possible put it in the freezer for 7 days. All insects like the dark so strong lighting will often get rid of them, but you have to remember to light under the bed, in corners too!
If you want to spray insecticide yourself Ficam or Empire 20 are possible sprays but still pretty nasty for a bedroom - I'd certainly want to move out for a few days.
You can get chemical sprayed by the environmental health dept of your council, usually for free, but it is nasty stuff and they spray a lot. You can identify a specialist in your area from the British Pest Control Association at www.bpca.org.uk. They will be able to idenify the insect definitely and shoud be able to spray a small amount, just targeting that particular insect.
Cedarwood, lavender, bay, rosemary and wormwood oils are all good at repelling insects but be careful as some are very poisonous.
HTH!