I'd love to hear more about the 'Dropbox clone' you're using here. The idea of keeping a VPS around as my own private cloud is something I've been thinking about for a while; I'm very interested to learn from someone who's already done it.
Like I said in reply to someone else, ownCloud works perfectly for me. Syncing apps for Linux and Mac OS X, web access on my tablet, Android client, and I think iphone is either out now or very near. Check it out!