It reminds me of a saying "Dogs and Cats living together … mass hysteria". It seems that Claudia Imhoff has written an article proclaiming that there is a role. I read this in Teradata Magazine, but Tim Matthews over at iPEDO did a great job in a post over on IT Toolbox (EII, the EDW and Teradata) of adding some other ideas along the idea of "leveraging as a prototyping tool for new EDW deployments".
I thought this was a good idea as both EII and Teradata leverage virtual views which lead well into each other and as Tim and I agreed in our conversation a while back – get the data into the hands of the user faster.
Another thing I thought I would add is that EII tools also add a layer of abstraction and ability to add to governance and SOA support, that I have not fully seen in Teradata as of yet. This is not saying that it isn’t there, but it is not yet widely known. I think we will soon see an important place for EII in the SOA and Governance realm as these become more prevelant.