Storing temporary images - is there a best practice approach?

[eluser]bretticus[/eluser]
I think the easiest option is Option 3
- Have a temporary upload directory (/temp_images)
- Have a saved upload directory (/saved_images) - once the user saves the product, the images get moved here
- Have a cron job and use a variation of the find command to delete images older than x number of days in the temp folder.