There is another intrestin article about Microsoft Volta and GWT technologies posted on AJAX World magazine by James McKay in which he analyzing all advantages and weaknesses of this technologies. He writes:

«There’s been quite a bit of hype recently about Volta, the latest and greatest offering from Microsoft. It’s a bit like the Google Web Toolkit or RJS in Ruby on Rails, in that it allows you to write everything in C# and have it translated into JavaScript. You don’t even have to use C# - you could just as easily use VB, since it works on the compiled MSIL, converting that into JavaScript.

It allows you to split your application at the lower tiers as well, automatically generating web services so that you can put, say, the user authentication part of your application on a different server to the main site.»
You can read full version of this article on AJAX World Magazine site.