> If I need an instance of java running per client, it's going to be
> impossible to serve unless I have more than 50 servers (which is very
> expensive just on electricity)
You don't need Java running. There's a C API to input data if you
wanted, or you can use the MySQL interface or you can just upload to the
HTTP server. However, I'd say it's more suited to relatively small
files, and I don't think if you're only serving a few thousand that you
wouldn't benefit from it.

Marcus.