I found this old thread and wanted to let you guys and update.
I just signed up because Sugarsync released an update for their Android App.
I've been using Dropbox but SugarSync looks very promising since Dropbox's app seems very limited still.
Best of all, Sugarsync is much more generous with their free space now: 5gig signing bonus and 500mb referral bonus that is unlimited until May 31st
Anyway, feel free to give the OP more space with his referral or use my referral link... either way, give it try at least
https://www.sugarsync.com/referral?rf=ewxiovt892qmw