Cloud Drive - What for what

(Notice that this list ONLY MAKE SENSE TO ME because of the special restriction at my work place.)

With the release of Google Drive, cloud storage war is heating up.  Here's my decision tree on when to use what cloud drive.

Dropbox: Skip, because it's been blocked by my workplace

SkyDrive: Skip, because it's been blocked by my workplace

ZumoDrive:

• Only provide 1Gb  of space.  Not enough to do much useful stuff.
• Still it has a good audio player support on iPad, so maybe I can use it to host some audiobook.

Box.Net:

•  Good for hosting ebook, and documnet.
• Not so good for music since the music player on iPad isn't good.

SugarSync

• Has  a good iPad audio player, so great for hosting songs.