Which Data Warehouse Infrastructure to use?

OMG! Problem of selection of components has finally started again. Question is: Which data warehouse infrastructure to use for Research Engine?

Available choices are:

1. Apache Hive - http://hadoop.apache.org/hive/
2. IBM InfoSphere Warehouse - http://www-01.ibm.com/software/data/infosphere/warehouse/
   
3. Mike 2 - http://mike2.openmethodology.org/
4. MySQL (Really ?) - http://opensourceanalytics.com/2005/11/03/data-warehousing-with-mysql/

If you've got any experience in implementing any one (or more) of the above list, please do let me know. I can surely use your help. Got anything more? Better suggestions? Please do comment..

Update: Since its TGMC, i'm sticking with InfoSphere.