Colin is probably one of the best minds in encryption that I know of. He wrote Scrypt[1] as well. My gripe has always been that while Tarsnap is a product that is clearly built for developers, it does not have to look and feel like the 90's and use obscure and non-intuitive billing (picodollar). The web interface and landing site need some designer/UX love for sure, but at the same time I think Colin is happy and satisfied with how things are going. Highly recommend Tarsnap.