"This is the information that was missing from the article (at least for me)."
yehhh, it's tricky to cover a comprehensive topic, and often it's interactive discussion that works better for some (hellooo :)
"Well, actually quite a bit of money is spent on the support..."
oh dear! try http://siriusit.co.uk they actually employ or have contacts with many of the developers who work on products that their customers deploy, such as postgresql, kde, samba etc. unfortunately, with google's policy of employing many of the worlds' top free software developers (so that nobody else can) it's a quite a hard trick for any support company to pull off.
"you should be grateful that google released GWT as free software
I don't feel like, because I hope I never have to use it, neither as a developer or a user. Web-based UIs (in my experience) suck, regardless of the technology behind them. "
the skills list required to do decent web-based user interfaces is just absolutely horrendous. i listed them only last week: http://advogato.org/person/lkcl/diary/623.html - many people simply cannot cope with this, in order to create the level of UI interaction experience that web users expect these days.
both GWT and Pyjamas do that: one for java developers, one for python developers. (there's also RWT (RubyJS) but its development stopped in 2007 unfortunately).