Dehumidifiers are great; we moved 3 months ago into a house which had been unoccupied for some time and was damp. I bought a new Delonghi DEM10 from Ebay for £45 and it is fantastic and doesn't use much electric either (I have an EON electric monitor )
Every morning until recently it had almost a full tank of water, less now as house is drying out. Also makes the house smell nicer and is great for drying clothes!
gettingeasier Whereabouts are you? I have a dehumidifier going cheap if you fancy it if you are near London... LOL!
Seriously though, we bought a Prem-I-Air dessicant one and they have a good range of dehumidifiers for different purposes: http://www.prem-i-air.com/product/index.php?cid=36 and we found it very useful for our son whose bedroom was subterranean.
It was fairly quiet, and meant to be fairly energy-efficient. And also it blew out some hot air as it extracted water so it made the room warmer too.