Yes there is, we have tested the following cloud-alternatives:
SkyDrive 1.1
Google Drive 1.2.228.32
4Shared 2.1.2
Ubuntu One Files 1.2.7
G Cloud Backup 3.0.0 (by Genie9)
Flickr 2.0.3
PhotoBucket 1.5.9
tumblr 3.4.0 (by TUMBLR)
There's also
YouWave's Shared Folder, which can be accesed thru (View → Open Shared Folder), files will appear inside youwave at location
/sdcard/cIn Windows XP you'll have to manually create the directory C:\Users\Public first.
Source:
List of known compatible apps