https://spideroak.com/pricing

Just use spideroak.  It does client side encryption, so all the data is encrypted locally before being transmitted to their servers.  Unlike dropbox, who has FULL ACCESS to your data and FULL ACCESS to disclose all your data directly to the government.

Also, you get the same free 2GB, but the prices are lower:

SpiderOak 2GB Free
DropBox 2GB Free

SpiderOak  100GB $10.00/mo
Dropbox 50GB $9.99/mo

Dropbox 100GB $19.99/mo

Spideroak 100GB $100/yr


I like when a company doesn't have to do that 1 cent down marketing $9.99 crap.  I respect them more.

The Spideroak client also lets you have more control over what you sync and some other stuff.  Check it out.