What projects use Groovy as its main development language ?

[MG]

A quick survey: Who on this mailing list works on or knows of a project 
where Groovy is the main language of development, i.e. it is not used as 
"just" a script or DSL language in addition to e.g. Java ?
If possible name the company/country/project and give some impression of 
the size of the project (lines of code, # of people working on it, etc), 
timeframe of development, and whether it is os or commercial (or both) G-)

Thanks in advance,
cheers,
mg