Hate to do a me too post, but I'm going to anyway. I made a very similar app for a weekend project back in early march of 2009. http://www.fileinaflash.com I used TFTP as the transfer protocol and it's not encrypted like Sendoid, but it works. Ultimately, although it costs next to nothing to run, I couldn't think of a good way to turn it into a business so it's just been sitting there for the past 2 years or so. Sendoid is way faster and prettier than what I made though. Great implementation. Good luck!