Re: Search for Multi-File Upload Script/Applet
Flash is probably a better option than a Java applet (since there will be no JVM issues and it's likely most users will have it installed and enabled) and if you're willing to provide a link back on the page, you can have a MultiPowUpload single-domain license free ($US99 otherwise). That's not an endorsement; I neither use the product nor am I affiliated with the company.
“Beware of bugs in the above code; I have only proved it correct, not tried it.” --Donald Knuth
"It was as if its architects were given a perfectly good hammer and gleefully replied, 'neat! With this hammer, we can build a tool that can pound in nails.'" -- Alex Papadimoulis (on TheDailyWTF.com)