FileFlux will very shortly be rolled out as the drag and drop option on the forum.
In the meantime the stand alone version has been updated and does now produce thumbnails (all file formats unlike the GoFile uploader)
Why not give it a go on this link
You must be registered to view links and images
Upload the files to the FileFlux server , when all uploads show in green as complete you can copy and paste the BBcode to your post.(the tab will not turn blue until all uploads are complete to avoid posting too early)
You can upload before the files have uploaded...