Good point, I only use TrueCrypt for sensitive documents (small in file size), and don't worry/notice the entire volume sync.

BoxCryptor does look like a great alternative; however, it's not open source and does come w/ a price (literally and figuratively - file names exposed if using free version or drop $50 USD).

Have you used BoxCryptor? Curious what your experience has been. I'll give it a try.