Absolutely YES!!!
It's so annoying to attach one file per time!!!
Please Google masters, hackers, gurus and genius, do it!!!
But well... There is a technological problem.
One way to upload files with html/javascript is using the <input
type=”file”> element, that is the one used by gmail (take a look at
the html source code); this element allow just one file per time... So
there shouldn't be any other solution.
But...
There is a smart solution implemented by the Stickman (
http://the-stickman.com/web-development/javascript/multiple-file-uploader-mootools-version/
) using DOM.
I'd take a look on it, it sounds really really smart!