Thinking through some export/import details.

gistfile1.js

  var zip = new require('node-zip')()
	us.map(blog.posts, function(post) {
		if (post.is_attachment) {
			console.log("Downloading: " + post.attachment_url)
			request(post.attachment_url, function(error, response, body) {
				if (!error && response.statusCode == 200) {
					console.log("Saving " + post.folder + post.fileName)
					zip.file(post.folder + post.fileName, body)
				}
			})
		} else {
			// create the string that goes into the file
			// create the metadata text string
			var content = ""
			us.map(us.keys(post), function(key){
				if (key !== 'content' && key !== 'folder' && key !== 'fileName') {
					content = content + key + ": " + post[key] + "\n"
				}
			})
			// using the text-metadata-parser requires an extra \n between the metadata and the content
			content = content + "\n"
			// content string
			content = content + post.content
			zip.file(post.folder + post.fileName, content)
		}
	})
	
	// output file
	var data = zip.generate({base64:false,compression:'DEFLATE'})
	fs.writeFile('output.zip', data, 'binary')