Sorry, I was being obtuse. I meant that Google's code is not OSS, where as Summingbird and Samza are. So while MillWheel might be great in theory, in practice I'm not going to use it and I'm not motivated enough to attempt to reimplement it.
I think @timclicks was replying to a deleted OT comment of mine asking why there was an automatically generated [scribd] in the submission title when the document isn't hosted on scribd. I deleted the comment when I realised that its not part of the title but is actually a (useful?) link to view the doc in scribd. I didn't want to add noise to the discussion, but it seems I failed...
