What are some alternatives?
When comparing MirrorAce and GO4UP, you can also consider the following products
MultiUp - Your files will be uploaded on many filehosting websites. MultiUp.org is a file mirror website.
MirrorCreator - Upload one file of 400 megs or less to multiple free file hosts -- 14 at most. 25 possible hosts.
Multifilemirror - Multifile mirror is a file mirroring website.
Jheberg - Uploadez vos fichiers chez le leader de l'hébergement MultiUpload.
Embed Upload - Embedupload.com uploads your files to multiple file hosting sites.
uploadmirrors - Uploadmirrors uploads your file to 27 different free file hosts.