I've posted a new draft of the File Writer API [1]. I've made the split between a save-one-blob interface and the richer interface that'll be needed for the filesystem [and possibly other ways of saving files] that we recently discussed [2]. I've switched to the terminology "FileSaver" for the former and "FileWriter" for the latter, and moved to a constructor for the former [3]. I've also done quite a bit of miscellaneous cleanup.
I look forward to your feedback. There will be a bit of a delay in my responses, as I'm about to go on vacation for a few weeks, but I'll respond to all comments when I come back. Eric [1] http://dev.w3.org/2009/dap/file-system/file-writer.html [2] http://lists.w3.org/Archives/Public/public-webapps/2010AprJun/1223.html [3] http://lists.w3.org/Archives/Public/public-webapps/2010JulSep/0156.html