I got 50gb space on Box.com last time for opening an account through Sony Ericsson android phone (Later all user got the same 50gb space).
However their desktop sync (available only for Windows and Mac) is only for paid user. I dont know how do they expect user to utilize all the 50gb space without desktop sync program available to them.
For comparison dropbox come with 2gb only, but have client for all (ok maybe not, but cover more than box did).
Now I browse around and found that Linux user can sync using davfs2. [Source]
Here what you need to do: (Here is tested working on my Fedora 16 LXDE box)
yum install davfs2
adduser -a -G <user> davfs2
echo “https://www.box.com/dav /home/<user>/box.net davfs rw,user,noauto 0 0″ > /etc/fstab
chmod u+s /usr/sbin/mount.davfs
Replace <user> with your own username (without < & >)
As <user> (your own user, exit from root):
echo “use_locks 0″ > ~/.davfs2/davfs2.conf
echo “https://www.box.com/dav <email> <password>” > ~/.davfs2/secrets
chmod 600 ~/.davfs2/secrets
Replace <email> with email you use to login to box (without < & >)
Replace <password> with password you login to box (without < & >)
After that when you open box.net folder in your user directory, it should load your box folder and files. Congrats!