Before I go any further, I just have to say...Quanp? That's an instant write-in candidate for the dumbest tech-product name of all time. I dislike it so much I almost didn't write about the service.
However, it turned out to be too cool to pass up. Quanp is actually much more sophisticated than Dropbox, with a robust desktop client for uploading and sharing files (you can also use a Web interface), a nifty 3D viewer for photos (this is a Ricoh product, after all), and the aforementioned 10GB of storage (Dropbox makes you pay for anything over 2GB).
There's definitely a learning curve, however, especially with the desktop client. But you should definitely check out Quanp Drop, a really cool Adobe Air-powered desktop widget for adding files to your library.
Want to learn more? Check out the Quanp overview and tutorial over at MakeUseOf.
One caveat: Quanp is currently in beta, and some of the "free trial" language suggests that perhaps your 10GB of storage won't be free indefinitely. Or maybe the service will merely be adding premium accounts down the road. Either way, I'd say it's worth a look.