Synchronize a folder on the SD-card with a folder in your dropbox automatically in the background.
Also contains a simple Norton Commander -style
file manager between SD-card and all dropbox accounts.
This app already contains "Remote Filemanager for Dropbox"
https://market.android.com/details?id=biz.wolschon.android.dropbox.dbfilemanager
News:
Be sure to enter the Dropquest (and install on a desktop too) to get +1GB (and +256MB) extra space!