qualcosa tipo http://www.jfileupload.com/products/...oad/index.html


JFileUpload allows to split file in chunks before upload. It's useful in HTTP transfer with server-side script that doesnt allow large upload. For instance, default PHP server only allows 2MB upload. Such limit could be increased by updating php.ini but some hosting services doesn't grant access to php.ini. To workaround such limitation, you can setup JFileUpload to cut file in small chunks and upload them one by one through:
<PARAM NAME="chunksize" value="2097152">
<PARAM NAME="chunkmode" value="onfly">
The server-side script will recompose file from chunks once all have been uploaded. However, JFileUpload will display info about each chunk upload in both info panel and progress bar
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ma gratis...
potrebbe essere questo? http://www.plupload.com/

EDIT,
forse questo č ok
http://www.zehnet.de/2009/02/23/flex...oad-component/