Application Development Trends [1], a leading provider of the latest Web technology news, talks about the Lift Web Framework [2] that is based on Scala. In his article, Open Source Project Gives Java Devs a 'Lift' [3], John K Waters says "Lift is breaking new ground in a number of areas" and developers have put "20 applications of Lift into commercial production".
Links:
[1] http://www.adtmag.com/
[2] http://liftweb.net/
[3] http://www.adtmag.com/article.aspx?id=24080