I have written in the past about efforts by Microsoft ( using SQL Server at http://www.sqlserverdatamining.com/cloud/) and the data browser ( at www.kirix.com ).
I have also written about my framework for using R based cloud computing.
Here is something exciting – Its from the founder of NetBeans and its called www.gooddata.com ) . The concept is simple and powerful and the company does have credentials to back it up. Again it’s a free trial so check it out –