Yup, I spent the first 2 months of the year putting up some bass absorbers, and they do work wonders for the sound. I used a semi-DIY approach - ordered some bass trap bags from here:
http://www.readyacoustics.com/index.php ... rod=RT426B , then bought some mineral wool slabs in a local store and fited it myself. Easy to assemble, very cheap, and the looks are great!
Good luck!!
T