Data Integration and Web Mashups on Collision Course?
Here's an interesting Techcrunch post on "5 Ways to Mix, Rip, and Mash your Data". It includes Yahoo! pipes that I wrote about a couple of weeks ago, but also several other ETL-like technologies.
One in particular, called Proto, has the ability to mash together local data with information from the web (e.g. "map my Outlook contacts"), and the interface and choice of transformations (avoid null values, etc.) is very close to traditional data integration tools (see video).
There's no reason why this functionality can't be offered by the established DI vendors -- how long before one of them decides to purchase one of these vendors?