Webcast about DB2 9 compression this Thursday
June 15th webcast: DB2 Chat with the Lab - Using Data Compression to Cut Costs
It's difficult to overstate the impact of this one feature on DB2's overall performance. Simply put, compression means more rows per page, and therefore reduced page I/O cost for a given workload. The technology behind it is pretty slick, so you may want to read up on it a bit beforehand.
Also, I'd like to thank IBM for offering free transcripts of their previous DB2 9 webcasts. It is nice to see so much effort going into educating people about this release.