If you want to keep current in the latest in data warehousing thinking, I recommend the following sites where you do not have to pay or register to access most of the information:
DBMS2 – Probably the best data warehousing news source there is.
BeyeNetwork Articles – The non–commercial part of this huge site.
BI Blogs - Pulls articles from a variety of blogs of varying quality but nevertheless is informative.
Kimball Group Data Warehousing Articles - Intelligent writings from Ralph Kimball and his associates.
Peter Thomas Blog - Intelligent blog from another industry veteran.
Visual Business Intelligence - Is a provocative, excellent blog by Stephen Few
OCDQ Blog - Is a great blog on data quality by Jim Harris.
Also, there is an active data warehousing/business intelligence community on Twitter. Some of the persons who participate are listed here.