Compressing table images

My apologies if this subject has already been hashed to death, or if 
this is the wrong list, but I was wondering if people had seen this paper:
http://www.cwi.nl/htbin/ins1/publications?request=intabstract&key=ZuHeNeBo:ICDE:06

Basically it describes a compression algorithm for tables of a 
database.  The huge advantage of  doing this is that it reduced the disk 
traffic by (approximately) a factor of four- at the cost of more CPU 
utilization. 

Any thoughts or comments?

Brian